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You searched for: Journal name Helgoland marine research Remove constraint Journal name: Helgoland marine research Subject females Remove constraint Subject: females
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1. Ovary resorption in the Norway lobster (Nephrops norvegicus) and its possible causes with special reference to sperm storage

Author:
Carola Becker; Jaimie T. A. Dick; E. Mánus Cunningham; Mathieu Lundy; Ewen Bell; Lawrence Eagling; Julia D. Sigwart
Source:
Helgoland marine research 2020 v.74 no.1 pp. 12
ISSN:
1438-387X
Subject:
Nephrops norvegicus; autumn; body size; females; insemination; periodicity; research; resorption; sexual maturity; spermatozoa; spring; summer; winter; Irish Sea; North Sea
Abstract:
... The Norway lobster, Nephrops norvegicus, is an important fisheries species in the North-East Atlantic area. In some circumstances, mature females of Nephrops norvegicus can resorb their ovary rather than completing spawning, but the implications of this phenomenon to reproductive biology and fisheries sustainability are not known. To understand after effects of ovary resorption, we studied long-te ...
DOI:
10.1186/s10152-020-00543-8

2. Cuttlebone morphometrics and sex identification of Sepia bertheloti (d’Orbigny, 1835) from the central-east Atlantic

Author:
Airam Guerra-Marrero; David Jiménez-Alvarado; Vicente Hernández-García; Leticia Curbelo-Muñoz; José Juan Castro-Hernández
Source:
Helgoland marine research 2019 v.73 no.1 pp. 10
ISSN:
1438-387X
Subject:
Sepia; females; gonads; males; morphometry; oocytes; Africa
Abstract:
... Analysis of 322 cuttlebones of Sepia bertheloti caught in the waters of the Northwest Africa showed significant differences in growth between males and females. Morphometric analysis revealed a relatively different cuttlebone growth pattern between sexes, with males presenting faster growth in length to reach larger sizes and females displaying greater growth in width. This difference in cuttlebon ...
DOI:
10.1186/s10152-019-0531-0

3. Neohelice granulata burrow fidelity behaviour related to landscape heterogeneity

Author:
J. D. Nuñez; P. D. Ribeiro; E. H. Ocampo; T. A. Luppi
Source:
Helgoland marine research 2018 v.72 no.1 pp. 17
ISSN:
1438-387X
Subject:
animal models; behavior change; body size; burrows; crabs; environmental factors; females; landscapes; latitude; males; mark-recapture studies; philopatry; salt marshes; summer; tides; vegetation; Argentina
Abstract:
... Neohelice granulata provides an interesting animal model for studying behavioural process because it is widely distributed, ensuring variability related to different environmental conditions. The aim of this study was to analyse variation in site fidelity with relation to landscape heterogeneity. Field observations were carried out in three geographically distant marshes in Argentina (Mar Chiquita ...
DOI:
10.1186/s10152-018-0518-2

4. The influence of season and the tidal cycle on division of labour by the radula during feeding in the estuarine brooding gastropod Crepipatella dilatata (Calyptraeidae)

Author:
O. R. Chaparro; J. A. Montory; C. J. Segura; V. M. Cubillos; L. P. Salas-Yanquin; R. J. Thompson
Source:
Helgoland marine research 2018 v.72 no.1 pp. 3
ISSN:
1438-387X
Subject:
Calyptraeidae; brooders; environmental factors; estuaries; extrusion; females; grazing; males; mouth; neck; reproduction; salinity; summer; suspension feeding; winter
Abstract:
... The brooding gastropod Crepipatella dilatata can feed by scraping the substrate with the radula and by suspension-feeding, which also requires use of the radula. There is a “division of labour” for the radula among three discrete tasks associated with feeding: (1) removing mucous balls from the food pouch; (2) transferring the mucous cord from the neck channel to the mouth (both components of susp ...
DOI:
10.1186/s10152-018-0505-7

5. Description, systematics and ecology of a new tanaidacean (Crustacea, Peracarida) species from mediterranean fish farms

Author:
P. Esquete; V. Fernandez-Gonzalez
Source:
Helgoland marine research 2017 v.70 no.1 pp. 27
ISSN:
1438-387X
Subject:
Ceramiaceae; Crustacea; algae; cages; ecology; females; fish farms; fouling; lawns and turf; males; taxonomic keys; Mediterranean Sea
Abstract:
... An undescribed species of tanaidacean belonging to the genus Hexapleomera, tribe Pancolini, Hexapleomera bultidactyla sp. nov. was found in fouling community samples from off-coast fish farms cages in the western Mediterranean Sea. The species can be distinguished from other Hexapleomera species by the presence of a ventral apophysis on the dactylus of the chela in males. Other diagnostic characte ...
DOI:
10.1186/s10152-016-0480-9

6. Growth and reproduction of the north-eastern Atlantic keystone species Patella aspera (Mollusca: Patellogastropoda)

Author:
Ricardo Sousa; João Delgado; Ana Rita Pinto; Paulo Henriques
Source:
Helgoland marine research 2017 v.71 no.1 pp. 8
ISSN:
1438-387X
Subject:
Patella aspera; allometry; females; gametogenesis; gonads; keystone species; limpets; males; monitoring; mortality; population dynamics; sexual maturity; spawning; winter
Abstract:
... The growth and reproductive biology of the limpet Patella aspera were studied in the north-eastern Atlantic, Madeira archipelago, to enhance the knowledge concerning biological parameters and population dynamics of this species. This study comprised the estimation of growth rates, sexual maturity, reproduction, recruitment patterns, mortality coefficients and the exploitation rate, and yield-per-r ...
DOI:
10.1186/s10152-017-0488-9

7. Host-use pattern of the shrimp Periclimenes paivai on the scyphozoan jellyfish Lychnorhiza lucerna: probing for territoriality and inferring its mating system

Author:
J. Antonio Baeza; Samara de Paiva Barros-Alves; Rudá Amorim Lucena; Silvio Felipe Barbosa Lima; Douglas Fernandes Rodrigues Alves
Source:
Helgoland marine research 2017 v.71 no.1 pp. 17
ISSN:
1438-387X
Subject:
Crustacea; Poisson distribution; Scyphozoa; allometry; claws; environmental factors; estuaries; females; hosts; males; mating systems; models; population distribution; reproductive performance; rivers; sexual dimorphism; shrimp; social behavior; territoriality; Brazil
Abstract:
... In symbiotic crustaceans, host-use patterns vary broadly. Some species inhabit host individuals solitarily, other species live in heterosexual pairs, and even other species live in aggregations. This disparity in host-use patterns coupled with considerable differences in host ecology provide opportunities to explore how environmental conditions affect animal behavior. In this study, we explored wh ...
DOI:
10.1186/s10152-017-0497-8

8. Morphological descriptions of the eggcases of skates (Rajidae) from the central-western Mediterranean, with notes on their distribution

Author:
Cristina Porcu; Martina F. Marongiu; Andrea Bellodi; Rita Cannas; Alessandro Cau; Riccardo Melis; Antonello Mulas; Giuditta Soldovilla; Laura Vacca; Maria C. Follesa
Source:
Helgoland marine research 2017 v.71 no.1 pp. 10
ISSN:
1438-387X
Subject:
Leucoraja; Polystigma; Raja; egg masses; females; fisheries; horns; morphometry; multivariate analysis; philopatry; surveys; taxonomic keys; Mediterranean Sea
Abstract:
... Eggcases of eight rajiform skates (Dipturus nidarosiensis, D. oxyrinchus, Leucoraja melitensis, Raja asterias, R. brachyura, R. clavata, R. miraletus and R. polystigma) present in the central-western Mediterranean are described, based on specimens obtained from fishery surveys. Eggcase features such as dimensions, horns and apron lengths, and presence/absence of lateral keels were crucial to discr ...
DOI:
10.1186/s10152-017-0490-2

9. Site fidelity and population structure of blue land crabs (Cardisoma guanhumi Latreille, 1825) in a restricted-access mangrove area, analyzed using PIT tags

Author:
Denise Moraes-Costa; Ralf Schwamborn
Source:
Helgoland marine research 2018 v.72 no.1 pp. 1
ISSN:
1438-387X
Subject:
breeding season; burrows; color; crabs; endangered species; females; habitat destruction; males; models; philopatry; population structure; seasonal variation; transponders; Brazil
Abstract:
... Understanding the patterns of displacement and site fidelity in blue land crabs (Cardisoma guanhumi Latreille, 1825) has important implications for their conservation and management. The central objective of this study was to analyze seasonal variations in site fidelity in C. guanhumi, a species that is intensively exploited in Brazil, in spite of being part of the Official National List of Critic ...
DOI:
10.1186/s10152-017-0504-0

10. Embryo brooding and its effect on feeding in the bivalve Gaimardia bahamondei Osorio & Arnaud, 1984

Author:
P. V. Andrade-Villagrán; O. R. Chaparro; L. M. Pardo; F. J. Paredes-Molina; R. J. Thompson
Source:
Helgoland marine research 2016 v.70 no.1 pp. 4
ISSN:
1438-387X
Subject:
Bivalvia; adults; brooders; females; males; microalgae
Abstract:
... Gaimardia bahamondei is a small gonochoric bivalve which lives attached to subtidal algae. Females brood their embryos in the suprabranchial region of the pallial cavity, in close proximity to the gill filaments. We found no significant difference in clearance rate between males (non-brooders) and females (brooders), regardless of the numbers of embryos in the brood, suggesting that the presence o ...
DOI:
10.1186/s10152-016-0456-9

11. Reproductive strategy of forkbeard, Phycis phycis, from the Portuguese coast

Author:
Ana Rita Vieira; Vera Sequeira; Ana Neves; Rafaela Barros Paiva; Leonel Serrano Gordo
Source:
Helgoland marine research 2016 v.70 no.1 pp. 3
ISSN:
1438-387X
Subject:
Phycis phycis; coasts; fecundity; females; fish; gonadosomatic index; males; oocytes; ovarian cysts; population dynamics; spawning
Abstract:
... Knowing fish reproductive strategy is essential for understanding population dynamics. This study intends to define the spawning season, length at first maturity, fecundity type, and estimate fecundity of forkbeard, Phycis phycis, from the Portuguese coast. Monthly samples collected from commercial landings between May 2011 and December 2012 were used. Results show that forkbeard is a group-synchr ...
DOI:
10.1186/s10152-016-0455-x

12. Comparative biology of the crab Goniopsis cruentata: geographic variation of body size, sexual maturity, and allometric growth

Author:
José Jonathas Pereira Rodrigues de Lira; Tereza Cristina dos Santos Calado; Carla Ferreira Rezende; José Roberto Feitosa Silva
Source:
Helgoland marine research 2015 v.69 no.4 pp. 335-342
ISSN:
1438-387X
Subject:
abdomen; allometry; body size; crabs; environmental factors; females; geographical variation; juveniles; latitude; males; phenotypic variation; population size; sexual maturity
Abstract:
... Geographic variation of phenotypic traits is common across species and is often associated with variation in environmental conditions. Here, we found larger bodies and larger size at maturity in a northward, lower latitude population of the crab Goniopsis cruentata, which inhabits a hotter, drier environment in comparison with a southward, higher latitude population. Furthermore, the juvenile male ...
DOI:
10.1007/s10152-015-0441-8

13. Comparative study of the female gametogenic cycle in three populations of Buccinanops globulosus (Caenogastropoda: Nassariidae) from Patagonia

Author:
María Soledad Avaca; Pablo Martín; Silvina van der Molen; Maite Narvarte
Source:
Helgoland marine research 2015 v.69 no.1 pp. 87-99
ISSN:
1438-387X
Subject:
Nassariidae; eggs; fecundity; females; fisheries; gametogenesis; life history; oocytes; photoperiod; playas; reproductive traits; sex differentiation disorders; sex ratio; spring; summer; surface water temperature; Argentina
Abstract:
... The populations of Buccinanops globulosus from three different sites of northern Patagonia were compared in the female reproductive cycle over a 2-year study period (September 2006–August 2008). These populations differed in demographic and life-history traits (sex ratios, size frequency distributions, growth rates and fecundity). Also, two of these populations show imposex-affected females (Bahía ...
DOI:
10.1007/s10152-014-0418-z

14. Comparison of life history traits of Tanais dulongii (Tanaidacea: Tanaididae) in natural and artificial marine environments of the south-western Atlantic

Author:
Carlos E. Rumbold; Sandra M. Obenat; Eduardo D. Spivak
Source:
Helgoland marine research 2015 v.69 no.2 pp. 231-242
ISSN:
1438-387X
Subject:
Crustacea; anaerobic conditions; animals; dissolved oxygen; females; food availability; habitats; juveniles; life history; longevity; males; pH; pollution; population density; predation; salinity; seawater; sex ratio; spring; summer; synergism; temperature
Abstract:
... Tanaidaceans are small benthic crustaceans with a strictly benthic life cycle and low dispersion rates, so they are good candidates to evaluate the effects of environment over life history strategies and reproductive biology. In this work, we studied two populations of Tanais dulongii (Audouin, 1826) that live in two contrasting habitats in order to determine whether they differ in life history tr ...
DOI:
10.1007/s10152-015-0432-9

15. Growth and reproductive biology of the sea star Astropecten aranciacus (Echinodermata, Asteroidea) on the continental shelf of the Catalan Sea (northwestern Mediterranean)

Author:
Marc Baeta; Eve Galimany; Montserrat Ramón
Source:
Helgoland marine research 2016 v.70 no.1 pp. 1
ISSN:
1438-387X
Subject:
Asteroidea; algal blooms; cecum; continental shelf; females; histology; males; seasonal growth; seawater; spawning; spring; water temperature; Mediterranean Sea
Abstract:
... The growth and reproductive biology of the sea star Astropecten aranciacus was investigated on the continental shelf of the northwestern Mediterranean Sea. Sea stars were captured monthly in two bathymetric ranges (5–30 and 50–150 m) between November 2009 and October 2012. Bathymetric segregation by size in A. aranciacus was detected: small individuals inhabit shallow areas (5–30 m), while large i ...
DOI:
10.1186/s10152-016-0453-z

16. Variations in egg characteristics of ruffe Gymnocephalus cernua inhabiting brackish and freshwater environments

Author:
Roland Svirgsden; Anu Albert; Mehis Rohtla; Imre Taal; Lauri Saks; Aare Verliin; Martin Kesler; Kalvi Hubel; Markus Vetemaa; Toomas Saat
Source:
Helgoland marine research 2015 v.69 no.3 pp. 273-283
ISSN:
1438-387X
Subject:
Gymnocephalus cernua; brackish water; correlation; egg quality; eggs; energy content; females; freshwater; freshwater fish; osmotic pressure; population; reproduction
Abstract:
... Egg characteristics of teleost fishes are affected by various abiotic and biotic factors. In order to reproduce successfully, freshwater fishes inhabiting brackish environments must alter their reproductive characteristics, including egg properties, to increased osmotic pressure. Ruffe Gymnocephalus cernua was used as a model species to compare egg characteristics between fish populations inhabiti ...
DOI:
10.1007/s10152-015-0436-5

17. Distribution and biological features of the common pandora, Pagellus erythrinus (Linnaeus, 1758), in the southern Tyrrhenian Sea (Central Mediterranean)

Author:
B. Busalacchi; T. Bottari; D. Giordano; A. Profeta; P. Rinelli
Source:
Helgoland marine research 2014 v.68 no.4 pp. 491-501
ISSN:
1438-387X
Subject:
Erythrinus; continental shelf; females; males; sex ratio; surveys; Tyrrhenian Sea
Abstract:
... A synthetic analysis of the distribution, abundance and some biological traits of the common pandora (Pagellus erythrinus) was performed. Data were gathered in 15 experimental bottom trawl surveys carried out off the southern Tyrrhenian Sea from 1994 to 2008. A total of 2,166 P. erythrinus were found in the investigated area, with a preference for the upper continental shelf (10–100 m). The highes ...
DOI:
10.1007/s10152-014-0404-5

18. Ecology and systematics of a new species of Uromunna (Crustacea: Isopoda) from Spanish eelgrass beds

Author:
Patricia Esquete; George D. F. Wilson; Jesús S. Troncoso
Source:
Helgoland marine research 2014 v.68 no.2 pp. 329-339
ISSN:
1438-387X
Subject:
Isopoda; Zostera marina; adults; ecology; females; leaves; males; new species; rhizomes; spring; summer; Iberian Peninsula
Abstract:
... Uromunna naherba sp. nov. is described from eelgrass beds (Zostera marina and Z. noltii) of the NW Iberian Peninsula. This is the second species of the genus reported from the NE Atlantic, after U. petiti. The new species was more abundant on rhizomes than on the leaves of the plants. Seasonal samples show that ovigerous females are present throughout the year, but become more abundant in late spr ...
DOI:
10.1007/s10152-014-0393-4

19. Growth, mortality, and reproduction of Tagelus plebeius (Bivalvia: Solecurtidae) in Southeast Brazil

Author:
Camila Fernanda da Silva; Guilherme Nascimento Corte; Leonardo Querobim Yokoyama; Jolnnye Rodrigues Abrahão; Antônia Cecília Zacagnini Amaral
Source:
Helgoland marine research 2015 v.69 no.1 pp. 1-12
ISSN:
1438-387X
Subject:
Veneroida; endangered species; longevity; reproduction; males; sex ratio; spawning; mortality; summer; coasts; fisheries; females; Brazil
Abstract:
... Tagelus plebeius (Lightfoot, 1786) is a stout razor clam that is economically exploited in several countries, including several local fisheries along the Brazilian coast. Despite its wide distribution and economic importance, there are few studies that have examined the population biology of this species. This study aimed to improve the current knowledge about the biology of T. plebeius by investi ...
DOI:
10.1007/s10152-014-0417-0

20. Mangrove habitat partitioning by Ucides cordatus (Ucididae): effects of the degree of tidal flooding and tree-species composition during its life cycle

Author:
A. C. Wunderlich; M. A. A. Pinheiro
Source:
Helgoland marine research 2013 v.67 no.2 pp. 279-289
ISSN:
1438-387X
Subject:
Avicennia; Laguncularia racemosa; Rhizophora mangle; breeding; breeding season; crabs; environmental factors; females; habitats; males; mangrove forests; population structure; sex ratio
Abstract:
... Environmental factors strongly affect mangrove crabs, and some factors modulate population structure and habitat partitioning during the crabs’ life cycle. However, the effect of these environmental factors on habitat selection by mangrove crabs is still unknown. We evaluated habitat selection by the mangrove crab Ucides cordatus in mangrove forests with different degrees of predominance of Rhizop ...
DOI:
10.1007/s10152-012-0322-3

21. Moult cycle and growth of the crab Halicarcinus planatus (Brachyura, Hymenosomatidae) in the Beagle Channel, southern tip of South America

Author:
Mariano J. Diez; Gustavo A. Lovrich
Source:
Helgoland marine research 2013 v.67 no.3 pp. 555-566
ISSN:
1438-387X
Subject:
crabs; females; males; molting; morphometry; reproduction; spring; summer
Abstract:
... The crab Halicarcinus planatus is the only hymenosomatid crab that inhabits the southern tip of South America and is the only decapod species that reproduces twice a year in the Beagle Channel. In this article, we study the moult cycle in the field (moult frequency, analysis of size frequency distribution) and linked it with growth studied in the laboratory (absolute and per cent growth increment, ...
DOI:
10.1007/s10152-012-0343-y

22. Relative growth and reproductive cycle of the date mussel Lithophaga lithophaga (Linnaeus, 1758) sampled from the Bizerte Bay (Northern Tunisia)

Author:
Ferdaous Jaafar Kefi; Samir Boubaker; Najoua Trigui El Menif
Source:
Helgoland marine research 2014 v.68 no.3 pp. 439-450
ISSN:
1438-387X
Subject:
allometry; females; gonadosomatic index; gonads; hermaphroditism; males; mussels; salinity; seawater; sex ratio; spawning; water temperature; winter; Tunisia
Abstract:
... Relative growth and the reproductive cycle of the date mussel Lithophaga lithophaga were studied from September 2002 to October 2003 in the Bizerte Bay (Northern Tunisia). Relationships between shell length and shell width, shell height as well as volume-related variables (shell dry weight, soft tissues dry weight and total wet weight) showed negative allometries in both sexes except for shell wid ...
DOI:
10.1007/s10152-014-0400-9

23. Reproductive biology of the prawn Melicertus kerathurus (Decapoda: Penaeidae) in Thermaikos Gulf (N. Aegean Sea)

Author:
Kosmas Kevrekidis; Maria Thessalou-Legaki
Source:
Helgoland marine research 2013 v.67 no.1 pp. 17-31
ISSN:
1438-387X
Subject:
Melicertus kerathurus; fecundity; females; fisheries; gonadosomatic index; insemination; oocytes; ovarian development; reproductive performance; shrimp; spawning; spermatophores; traditional technology; winter; Aegean Sea
Abstract:
... The reproductive biology including insemination frequency, ovarian maturation, gonadosomatic index (GSI), size at first maturity, and fecundity of Melicertus kerathurus were investigated using monthly samples from Thermaikos Gulf. Insemination was recorded by the presence of a spermatophore in the thelycum, and ovarian development was based on macroscopic ovarian staging (ST1–ST5). Inseminated fem ...
DOI:
10.1007/s10152-012-0301-8

24. On gonadic maturation and reproductive strategy in deep-sea benthic octopus Graneledone macrotyla

Author:
Ángel Guerra; María Pilar Sieiro; Álvaro Roura; Julio M. Portela; José Luís del Río
Source:
Helgoland marine research 2013 v.67 no.3 pp. 545-554
ISSN:
1438-387X
Subject:
Octopodidae; abnormal development; eggs; fecundity; females; fluorescence; oocytes; oviducts; ovulation; spawning; surveys; temperature
Abstract:
... The new information reported in this paper is based on five maturing and mature females of the large-tuberculate octopus Graneledone macrotyla. These specimens were caught in bottom trawl surveys ATLANTIS 2009 (February 24 to April 1, 2009) and ATLANTIS 2010 (March 9 to April 5, 2010) carried out off the Argentinean Economic Exclusive Zone. Capture depth ranged from 475 to 921 m and sea bottom tem ...
DOI:
10.1007/s10152-012-0342-z

25. Production of Excirolana armata (Dana, 1853) (Isopoda, Cirolanidae) on an exposed sandy beach in southeastern Brazil

Author:
Marcelo Petracco; Ricardo Silva Cardoso; Alexander Turra; Thais Navajas Corbisier
Source:
Helgoland marine research 2012 v.66 no.3 pp. 265-274
ISSN:
1438-387X
Subject:
Cirolanidae; biomass; ecosystems; eggs; energy flow; females; juveniles; males; Brazil
Abstract:
... The somatic and gonad productions of the cirolanid isopod Excirolana armata were analyzed by taking monthly samples from December 2003 to November 2005 on Una beach, São Paulo state (24°S), southeastern Brazil. Sampling was performed along three fixed transects established from the base of the foredunes to the waterline. Weight-specific growth rate was used to estimate the E. armata somatic prod ...
DOI:
10.1007/s10152-011-0268-x

26. Reproductive biology of Raja clavata (Elasmobranchii: Rajidae) from Southern Black Sea coast around Turkey

Author:
Hacer Saglam; Orhan Ak
Source:
Helgoland marine research 2012 v.66 no.2 pp. 117-126
ISSN:
1438-387X
Subject:
Raja clavata; egg masses; fecundity; females; males; regression analysis; Black Sea
Abstract:
... Specimens of Raja clavata were monthly collected at the coast of Havaalanı (Trabzon/Turkey) from January 2009 to December 2009 at depths between 20 and 40 m. A total of 230 individuals of thornback ray (131 females and 99 males) were collected by bottom trawls during research cruises. Using logistic regression, it was determined that TL at 50% maturity of males was 718 mm TL and of females 746 ...
DOI:
10.1007/s10152-011-0252-5

27. Reproductive plasticity in Petrolisthes armatus (Anomura, Porcellanidae): a comparison between a Pacific and an Atlantic population

Author:
Ingo S. Wehrtmann; Ivana Miranda; Claudia A. Lizana-Moreno; Patricio Hernáez; Vera Barrantes-Echandi; Fernando L. Mantelatto
Source:
Helgoland marine research 2012 v.66 no.1 pp. 87-96
ISSN:
1438-387X
Subject:
coasts; crabs; egg production; eggs; embryogenesis; environmental factors; females; geographical distribution; latitude; reproductive performance; water content; Brazil; Costa Rica
Abstract:
... The porcellanid crab Petrolisthes armatus, with a known geographic distribution covering a wide range of latitudes, was selected to conduct a comparative study on egg production and reproductive output between two populations from Pacific and Atlantic coasts. Ovigerous females were collected between September and November 2005 in Punta Morales, Pacific coast of Costa Rica (n = 137) and from Marc ...
DOI:
10.1007/s10152-011-0250-7

28. Reproductive traits of the small Patagonian octopus Octopus tehuelchus

Author:
Lorena P. Storero; Maite A. Narvarte; Raúl A. González
Source:
Helgoland marine research 2012 v.66 no.4 pp. 651-659
ISSN:
1438-387X
Subject:
Octopodidae; body size; energy; environmental factors; fecundity; females; males; maturity stage; oocytes; reproductive traits; seasonal variation; spawning; Argentina
Abstract:
... This study evaluated the reproductive features of Octopus tehuelchus in three coastal environments of San Matías Gulf (Patagonia). Monthly samples of O. tehuelchus were used to estimate size at maturity, compare seasonal changes in oocyte size frequency distributions between sites as well as oocyte number and size between female maturity stage and sites. Females in Islote Lobos had a smaller size ...
DOI:
10.1007/s10152-012-0298-z

29. Seasonal variation in reproductive traits of the oriental shrimp Palaemon macrodactylus (Crustacea: Caridea: Palaemonidae) in a non-native population

Author:
M. Guadalupe Vázquez; Claudia C. Bas; Eduardo D. Spivak
Source:
Helgoland marine research 2013 v.67 no.4 pp. 749-756
ISSN:
1438-387X
Subject:
Palaemon; breeding season; carbon; eggs; elemental composition; fecundity; females; larvae; nitrogen; reproductive performance; reproductive traits; seasonal variation; shrimp; Argentina
Abstract:
... The magnitude of variations in reproductive traits of Palaemon macrodactylus females throughout a breeding season was studied in a non-native population at Mar del Plata harbor, Argentina. Fecundity, egg size, reproductive output, weight and elemental composition of eggs, and larvae were analyzed in females collected at the beginning, in the mid point, and near the end of a reproductive season and ...
DOI:
10.1007/s10152-013-0360-5

30. The influence of habitat, season and tidal regime in the activity of the intertidal crab Neohelice (=Chasmagnathus) granulata

Author:
Tomás Luppi; Claudia Bas; Agustina Méndez Casariego; Mariano Albano; Juan Lancia; Marcelo Kittlein; Alan Rosenthal; Nahuel Farías; Eduardo Spivak; Oscar Iribarne
Source:
Helgoland marine research 2013 v.67 no.1 pp. 1-15
ISSN:
1438-387X
Subject:
burrows; coasts; crabs; environmental factors; females; food quality; habitats; latitude; males; pitfall traps; predation; salt marshes; space and time; spring; summer; temperature; tides; South America
Abstract:
... The activity pattern of intertidal crabs is influenced by factors that usually change rhythmically following tidal and/or diel cycles, and is often associated with the use of refuges. The movement activity of the burrowing crab Neohelice granulata was compared among three populations from SW Atlantic coastal areas where they face different tidal regimes, water salinities, substrata and biological ...
DOI:
10.1007/s10152-012-0300-9

31. A new species of Tigriopus (Copepoda, Harpacticoida, Harpacticidae) from Thailand with the description of its naupliar development

Author:
Supawadee Chullasorn; Viatcheslav N. Ivanenko; Hans-U Dahms; Pawana Kangtia; Wan-Xi Yang
Source:
Helgoland marine research 2012 v.66 no.2 pp. 139-151
ISSN:
1438-387X
Subject:
macroalgae; Copepoda; Ulva; body size; progeny; new species; females; nauplii; Thailand
Abstract:
... Both genders of Tigriopus thailandensis sp. nov. are described from a laboratory stock raised from individuals collected from the seaweed Enteromorpha clathrata in Thailand (Bangsaen Beach, Chonburi Province). Tigriopus thailandensis sp. nov. shares with its closest relative T. japonicus Mori, 1932 two setae on the third exopodal segment of leg 4 while other congeners bear 3 inner setae. However, ...
DOI:
10.1007/s10152-011-0254-3

32. Apseudopsis adami, a new species of tanaidacean (Crustacea: Peracarida) from the NW Iberian Peninsula: postmarsupial development and remarks on morphological characters

Author:
P. Esquete; R. N. Bamber; J. Moreira; J. S. Troncoso
Source:
Helgoland marine research 2012 v.66 no.4 pp. 601-619
ISSN:
1438-387X
Subject:
Crustacea; adults; females; flagellum; instars; intraspecific variation; juveniles; males; new species; shoulders; Iberian Peninsula
Abstract:
... A new species of apseudomorph tanaidacean, Apseudopsis adami sp. nov., is described, including intraspecific variation, from specimens collected in the seagrass meadows of O Grove inlet (NW Iberian Peninsula, NE Atlantic). The new species is characterized by the unique combination of the following characters: pointed rostrum with rounded shoulders, four ventral propodal spines on pereopod 1, and p ...
DOI:
10.1007/s10152-012-0295-2

33. Distribution and reproductive biology of the little cuttlefish Sepiola atlantica (Cephalopoda: Sepiolidae) around Anglesey, North Wales

Author:
N. J. E. Jones; C. A. Richardson
Source:
Helgoland marine research 2012 v.66 no.2 pp. 233-242
ISSN:
1438-387X
Subject:
Sepiidae; animals; body weight; environmental factors; fecundity; females; gonadosomatic index; population structure; seawater; spermatophores; temperature; Wales
Abstract:
... Sepiola atlantica were captured in seine nets at twelve locations around the coast of Anglesey, UK. Animals were most abundant on the very sheltered shore of Y Foryd Bay and the wave-exposed shore of Traeth Penrhos, and these two locations were further sampled seasonally to examine the seasonal occurrence, population structure and reproductive biology of S. atlantica. Sepiola atlantica (5–28 mm do ...
DOI:
10.1007/s10152-011-0265-0

34. Life history of Lineus viridis (Müller, 1774) (Heteronemertea, Nemertea)

Author:
Jörn von Döhren; Patrick Beckers; Thomas Bartolomaeus
Source:
Helgoland marine research 2012 v.66 no.3 pp. 243-252
ISSN:
1438-387X
Subject:
animals; autumn; dimorphism; eggs; females; gonads; hermaphroditism; life history; males; mating behavior; oogenesis; sand; sperm competition; spermiogenesis; spring; surveys; North Sea
Abstract:
... Lineus viridis is a common nemertean species of North-Atlantic intertidal sand flats. Its mating behaviour is peculiar insofar as this species is reported to be polyandric. However, detailed information on this topic is lacking. In order to get more data on the reproduction, oogenesis and life history of this species, a population in the Wadden Sea on the Isle of Sylt (North Sea) was studied betwe ...
DOI:
10.1007/s10152-011-0266-z

35. Population structure, growth and production of Thoracophelia furcifera (Polychaeta: Opheliidae) on a sandy beach in Southern Brazil

Author:
Mariana B. P. Otegui; Arno Blankensteyn; Paulo R. Pagliosa
Source:
Helgoland marine research 2012 v.66 no.4 pp. 479-488
ISSN:
1438-387X
Subject:
sediments; sieves; life history; longevity; secondary productivity; salinity; Polychaeta; mortality; biomass production; ecosystems; temperature; population structure; females; Brazil
Abstract:
... This study investigates aspects of the life history of the polychaete Thoracophelia furcifera on a sandy beach in southern Brazil. Two fixed transects perpendicular to the shoreline in the intertidal zone were sampled fortnightly from May 2008 to April 2009 at low tide. Five T. furcifera samples were collected along each transect and sediment temperature and the salinity of interstitial water were ...
DOI:
10.1007/s10152-011-0284-x

36. Receptivity of female Neohelice granulata (Brachyura, Varunidae): different strategies to maximize their reproductive success in contrasting habitats

Author:
María Paz Sal Moyano; Tomás Luppi; María Andrea Gavio; Micaela Vallina; Colin McLay
Source:
Helgoland marine research 2012 v.66 no.4 pp. 661-674
ISSN:
1438-387X
Subject:
Varunidae; crabs; eggs; epithelium; estuaries; females; habitats; ovulation; sperm competition; spermatophores; spermatozoa
Abstract:
... The extent of the receptive period may determine the mating strategies employed by female crabs to obtain mates. Here, we studied the receptivity of female Neohelice granulata (Dana, 1851) in the laboratory, including the form of the vulvae and the anatomy of the seminal receptacle (SR). We examined the factors that influence the duration of receptivity by comparing two populations inhabiting cont ...
DOI:
10.1007/s10152-012-0299-y

37. Spawning strategy in Atlantic bobtail squid Sepiola atlantica (Cephalopoda: Sepiolidae)

Author:
Marcelo Rodrigues; Manuel E. Garcí; Jesús S. Troncoso; Ángel Guerra
Source:
Helgoland marine research 2011 v.65 no.1 pp. 43-49
ISSN:
1438-387X
Subject:
Cephalopoda; aquariums; body size; body weight; clutch size; egg masses; eggs; females; reproductive traits; spawning; squid
Abstract:
... This study aimed to determine the spawning strategy in the Atlantic bobtail squid Sepiola atlantica, in order to add new information to the knowledge of its reproductive strategy. A total of 12 females that spawned in aquaria were examined. Characteristics of the reproductive traits and egg clutches were similar to those of other known Sepiolidae. Clutch size varied from 31 up to 115 eggs. Females ...
DOI:
10.1007/s10152-010-0199-y

38. Ultrastructure of oogenesis in imposex females of Babylonia areolata (Caenogastropoda: Buccinidae)

Author:
C. Muenpo; J. Suwanjarat; W. Klepal
Source:
Helgoland marine research 2011 v.65 no.3 pp. 335-345
ISSN:
1438-387X
Subject:
Babylonia areolata; cortical granules; cytoplasm; droplets; females; microvilli; oocytes; oogonia; sex differentiation disorders; tributyltin; ultrastructure; vitellogenesis
Abstract:
... During a tributyltin (TBT)-exposure experiment, the ultrastructural features of oogenesis have been examined in TBT-induced imposex females of Babylonia areolata and compared with those of the normal female. The results obtained from such experiment demonstrates that B. areolata exhibits a low to moderate intensity of imposex because all VDSI values are never higher than 3. Ultrastructures of germ ...
DOI:
10.1007/s10152-010-0227-y

39. The embryonic phase and its implication in the hatchling size and condition of Atlantic bobtail squid Sepiola atlantica

Author:
Marcelo Rodrigues; Ángel Guerra; Jesús S. Troncoso
Source:
Helgoland marine research 2011 v.65 no.2 pp. 211-216
ISSN:
1438-387X
Subject:
Cephalopoda; developmental stages; eggs; embryogenesis; females; hatching; life history; ontogeny; squid; temperature
Abstract:
... Early life stages of cephalopods are somewhat complex due to the life history strategy or species specificity of generalized ontogenetic patterns and processes. This work aimed to determine the time length of embryonic development at different temperatures, and if the egg size is a determinant of hatchling size in Sepiola atlantica d′Orbigny, 1839–1842. Successful hatching occurred in 98.5–100% of ...
DOI:
10.1007/s10152-010-0217-0

40. The reproductive cycle, size at maturity and fecundity of garfish (Belone belone, L. 1761) in the eastern Adriatic Sea

Author:
B. Zorica; G. Sinovčić; V. Čikeš Keč
Source:
Helgoland marine research 2011 v.65 no.4 pp. 435-444
ISSN:
1438-387X
Subject:
coasts; fecundity; females; fish; gonadosomatic index; males; oocytes; spawning; Adriatic Sea
Abstract:
... A recent study concerning the reproductive biology of the garfish (Belone belone, L. 1761) has been carried out in the eastern part of the Adriatic Sea along the Croatian coastline. Specimens of the fish (N = 3,393) were collected over a 6-year period (2003–2008). Their length varied between 20.8 and 75.4 cm (mean ± SD = 38.3 ± 7.94). Female garfish were dominant in larger length grou ...
DOI:
10.1007/s10152-010-0233-0

41. Absence of a prezygotic behavioural barrier to gene flow between the two sympatric morphs of the squat lobster Munida gregaria (Fabricius, 1793) (Decapoda: Anomura: Galatheidae)

Author:
Patricia Pérez-Barros; Javier A. Calcagno; Gustavo A. Lovrich
Source:
Helgoland marine research 2011 v.65 no.4 pp. 513-523
ISSN:
1438-387X
Subject:
Decapoda; females; gene flow; lobsters; males; mating behavior; morphs; phylogeny; random mating; reproductive isolation
Abstract:
... Munida gregaria and M. subrugosa have been considered two different species for more than a century; however, after a recent molecular phylogenetic study, they are considered a single polymorphic species. Yet, the use of markers to diagnose species may be misleading when divergence between species is recent, since a speciation event may be obscured by the retention and stochastic sorting of ancest ...
DOI:
10.1007/s10152-010-0240-1

42. Ameiridae Boeck and Argestidae Por revisited, with establishment of Parameiropsidae, a new family of Harpacticoida (Crustacea, Copepoda) from deep-sea sediments

Author:
P. H. C. Corgosinho; P. Martínez Arbizu
Source:
Helgoland marine research 2010 v.64 no.3 pp. 223-255
ISSN:
1438-387X
Subject:
Copepoda; basins; body length; claws; females; males; marine sediments; monophyly; mouthparts; new family; new species; Angola; Arctic region; Guinea
Abstract:
... Four new species of Parameiropsis are described from Angola and Guinea Basins and the Arctic Laptev Sea. The male of Parameiropsis poseidonicus sp. n. differs from that of P. neptuni sp. n. and P. senckenbergi sp. n. in antennule segmentation, length of the proximal aesthetasc, length of the outermost seta of the antennary endopod, degree of reduction of the mouthparts, relative length of the inne ...
DOI:
10.1007/s10152-009-0185-4

43. Biology of Grapsus grapsus (LINNAEUS, 1758) (Brachyura, Grapsidae) in the Saint Peter and Saint Paul Archipelago, Equatorial Atlantic Ocean

Author:
A. S. Freire; M. A. A. Pinheiro; H. Karam-Silva; M. M. Teschima
Source:
Helgoland marine research 2011 v.65 no.3 pp. 263-273
ISSN:
1438-387X
Subject:
Grapsidae; cannibalism; color; computer software; crabs; females; habitats; males; molting; population density; predators; puberty; Atlantic Ocean
Abstract:
... Eleven expeditions were undertaken to the Saint Peter and Saint Paul Archipelago to study the reproductive biology of Grapsus grapsus, providing additional information on limb mutilation and carapace colour. MATURE software was used to estimate morphological maturity, while gonadal analyses were conducted to estimate physiological maturity. The puberty moult took place at larger size in males (51. ...
DOI:
10.1007/s10152-010-0220-5

44. Brooding in Psolus patagonicus (Echinodermata: Holothuroidea) from Argentina, SW Atlantic Ocean

Author:
Juliana Giménez; Pablo E. Penchaszadeh
Source:
Helgoland marine research 2010 v.64 no.1 pp. 21-26
ISSN:
1438-387X
Subject:
Holothuroidea; eggs; females; juveniles; scallops; spawning; Argentina; Atlantic Ocean
Abstract:
... The mode, season, and time of brooding, egg diameter, egg number per brood, and the characteristics of newly released juveniles of Psolus patagonicus were investigated off Mar del Plata, Buenos Aires, Argentina, between October 1999 and February 2001. Individuals were attached to the Patagonian scallop, Zygochlamys patagonica. Spawning occurs between February and March. The mean egg diameter, 887  ...
DOI:
10.1007/s10152-009-0161-z

45. Deep-sea parasitic nematodes of the genus Trophomera Rubtsov et Platonova, 1974 (Benthimermithidae) from the Equatorial Atlantic, with the descriptions of two new species

Author:
Dmitry M. Miljutin
Source:
Helgoland marine research 2011 v.65 no.2 pp. 245-256
ISSN:
1438-387X
Subject:
Nematoda; animal ovaries; anus; basins; body length; eggs; females; midgut; mouth; new species; oviducts; parasites; pharynx; sensilla; uterus; Argentina; Atlantic Ocean; Brazil
Abstract:
... Nematode females of the genus Trophomera (Benthimermithidae) from the collection of the Smithsonian’s National Museum of Natural History (Washington, DC, USA) were examined. Nematodes were collected in different parts of the Western Atlantic (Hatteras Abyssal Plain, Brazil Basin, and Argentina Basin) from depths of 467–5,223 m. Two new species are described. Body length of T. americana sp. n. is 3 ...
DOI:
10.1007/s10152-010-0225-0

46. Morphology and function of the reproductive tract of the spider crab Libinia spinosa (Crustacea, Brachyura, Majoidea): pattern of sperm storage

Author:
M. P. Sal Moyano; M. A. Gavio; E. I. Cuartas
Source:
Helgoland marine research 2010 v.64 no.3 pp. 213-221
ISSN:
1438-387X
Subject:
Majidae; crabs; epithelium; females; males; spermatheca; spermatogonia; spermatophores; spermatozoa; testes
Abstract:
... Morphology and function of the male reproductive tract, female spermatheca and patterns of sperm storage were assessed in the crab Libinia spinosa using histological methods. Testes are characterized by the presence of peripheral spermatogonia and different sequences of sperm maturity. Spermatophores begin to be packed in the last portion. The vas deferens consists of three sections: anterior, wit ...
DOI:
10.1007/s10152-009-0180-9

47. Apodopsyllus gabesensis n. sp.: a new species of Paramesochridae (Copepoda: Harpacticoida) from the Gulf of Gabès (south-eastern Tunisia)

Author:
Jalila Amorri; Gritta Veit-Köhler; Jan Drewes; Patricia Aïssa
Source:
Helgoland marine research 2010 v.64 no.3 pp. 191-203
ISSN:
1438-387X
Subject:
Copepoda; coasts; females; males; new species; Tunisia
Abstract:
... Several specimens belonging to a new species of Apodopsyllus were collected during a study on the diversity of meiobenthic communities in the Gulf of Gabès, a Mediterranean shallow-water bay at the south-eastern coast of Tunisia in July 2005. The new species Apodopsyllus gabesensis n. sp. shares the characteristics of the genus such as the lack of endopods from P2 to P4 and the soft and slightly c ...
DOI:
10.1007/s10152-009-0178-3

48. Macroalgal fouling on the intertidal mole crab Emerita analoga facilitates bird predation

Author:
Fernando J. Hidalgo; Fausto N. Firstater; Betina J. Lomovasky; Percy Gallegos; Patricia Gamero; Oscar O. Iribarne
Source:
Helgoland marine research 2010 v.64 no.4 pp. 367-376
ISSN:
1438-387X
Subject:
littoral zone; females; macroalgae; profitability; birds of prey; Emerita; mortality; predation; fouling; adults; Peru
Abstract:
... In this work, we studied the effects of predation by birds on the intertidal mole crab Emerita analoga fouled by macroalgae in a sandy beach of central Peru (11° S). The epibiosis affected mostly the larger animals, especially adult females. Epibiosis prevalence for the entire intertidal population was relatively low (1–2%), however, within the size range affected by epibiosis in the intertidal zo ...
DOI:
10.1007/s10152-010-0193-4

49. Males and females gonad fatty acids of the sea urchins Paracentrotus lividus and Arbacia lixula (Echinodermata)

Author:
Inés Martínez-Pita; Francisco J. García; María-Luisa Pita
Source:
Helgoland marine research 2010 v.64 no.2 pp. 135-142
ISSN:
1438-387X
Subject:
Arbacia; Paracentrotus lividus; animal ovaries; coasts; fatty acid composition; fatty acids; females; gametogenesis; germ cells; males; testes; Mediterranean region; Spain
Abstract:
... The aim of this study was to analyze male and female gonad fatty acids of two sea urchin species, Paracentrotus lividus and Arbacia lixula, from the south coast of Spain. Additionally, we investigated possible differences between two locations. The ovaries of both species showed higher percentages of 14:0, 16:0, 16:1n-7, 18:2n-6, 18:3n-3 and 18:4n-3 than testes and lower levels of 18:0, 22:1n-9, 2 ...
DOI:
10.1007/s10152-009-0174-7

50. Morphology of the first zoeal stage of the commensal southwestern Atlantic crab Austinixa aidae (Righi 1967) (Brachyura: Pinnotheridae), hatched in the laboratory

Author:
Fernando L. Mantelatto; José A. Cuesta
Source:
Helgoland marine research 2010 v.64 no.4 pp. 343-348
ISSN:
1438-387X
Subject:
burrows; crabs; females; shrimp; Brazil
Abstract:
... The first zoeal stage of the endemic southern Atlantic pinnotherid crab Austinixa aidae is described and illustrated based on laboratory-hatched material from ovigerous females collected from the upper burrows of the thalassinidean shrimp Callichirus major at Ubatuba, São Paulo, Brazil. The zoeae of Austinixa species can be distinguished from other pinnotherids and especially from zoeae of the clo ...
DOI:
10.1007/s10152-010-0189-0