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	Provedor de dados Neotropical Ichthyology (4) Autor Macchi,Gustavo J. (4) Militelli,María I. (2) Rodrigues,Karina A. (2) Colonello,Jorge H. (1) Ehrlich,Martín D. (1) Galíndez,Elena J. (1) García,Sebastián (1) Irigoyen,Alejo J. (1) López,Sofía (1) Massa,Agueda (1) Venerus,Leonardo A. (1) Villanueva-Gomila,Gabriela L. (1) Wehitt,Anahí (1) Mais... Palavra-chave Reproduction (2) Arhynchobatidae (1) Batch fecundity (1) Biochemical composition (1) Bonaerense Coastal Ecosystem (1) Condition (1) Dimorphism (1) Elasmobranchs (1) Energy density (1) Fecundity (1) Gonadosomatic index (1) Length at 50% maturity (1) Length at first maturity (1) Maturity (1) Red porgy (1) Rocky-reef fishes (1) Southwest Atlantic (1) Spawning frequency (1) Mais... Tipo do documento Info:eu-repo/semantics/article (4) Ano 2018 (1) 2017 (1) 2015 (1) 2013 (1) País Brazil (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última The reproductive biology of Pinguipes brasilianus Cuvier, 1829 (Osteichthyes: Pinguipedidae) in temperate rocky reefs of Argentina Neotropical Ichthyology Villanueva-Gomila,Gabriela L.; Macchi,Gustavo J.; Ehrlich,Martín D.; Irigoyen,Alejo J.; Venerus,Leonardo A.. ABSTRACT Pinguipes brasilianus is a conspicuous and abundant rocky-reef fish inhabiting the Northern Patagonian gulfs of Argentina, Southwest Atlantic. This study describes its reproductive biology in this region. We made macroscopic and histological descriptions of the testis and ovary development, analyzed the evolution of the gonadosomatic index (GSI) in both sexes throughout the year, and estimated fecundity and length at 50% maturity for females. Pinguipes brasilianus is a multiple spawner with indeterminate annual fecundity and an extended reproductive season, encompassing austral spring and summer. Low GSI values in males (monthly means ranged between 0.11% and 0.75%) and low relative fecundity in female fish (between 2 and 44 oocytes/g) are... Tipo: Info:eu-repo/semantics/article Palavras-chave: Batch fecundity; Gonadosomatic index; Length at 50% maturity; Rocky-reef fishes; Southwest Atlantic. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000400733 Reproductive potential of Pagrus pagrus (Perciformes: Sparidae) in coastal waters of Buenos Aires Province (Argentina) and Uruguay (34º-39ºS) Neotropical Ichthyology Militelli,María I.; López,Sofía; Rodrigues,Karina A.; García,Sebastián; Macchi,Gustavo J.. ABSTRACT The reproductive potential of red porgy in coastal waters of Buenos Aires Province (Argentina) and Uruguay (34º-39ºS) was studied by means of a macroscopic and histological analysis of the gonads. Length and age at first maturity were determined, and fecundity, spawning frequency and egg quality were estimated. The spawning season extended from spring through summer between October and January with a peak of spawning in December. Length and age at maturity for sexes combined was 24.5 cm TL and 1.54 years, respectively. Batch fecundity ranged from 6,974 (25 cm TL) to 110,725 (39 cm TL) hydrated oocytes and showed significant linear relationships with total length and ovary-free weight. Relative fecundity ranged from 16 to 172 oocytes per female... Tipo: Info:eu-repo/semantics/article Palavras-chave: Bonaerense Coastal Ecosystem; Fecundity; Length at first maturity; Red porgy; Spawning frequency. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000200216 Seasonal analysis of condition, biochemical and bioenergetic indices of females of Brazilian flathead, Percophis brasiliensis Neotropical Ichthyology Rodrigues,Karina A.; Macchi,Gustavo J.; Massa,Agueda; Militelli,María I.. Percophis brasiliensis is a demersal species that constitutes an important resource of Argentine coastal fisheries. Nevertheless, information about bioenergetic dynamic of reproduction has not been reported. Therefore, seasonal variations of condition factors, biochemical composition and energy density of different tissues were analyzed in order to determine the strategy of energy allocation during the reproductive cycle of this species. Condition indices (hepatosomatic and K) showed a seasonal pattern opposite to that observed for gonadosomatic index, which was characterized by higher values during the reproductive period (spring-summer), decreasing at the end of spawning. Biochemical composition of different tissues also showed a clearly seasonality... Tipo: Info:eu-repo/semantics/article Palavras-chave: Biochemical composition; Condition; Energy density; Reproduction. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000100153 Reproductive biology of the eyespot skate Atlantoraja cyclophora (Elasmobranchii: Arhynchobatidae) an endemic species of the Southwestern Atlantic Ocean (34ºS - 42ºS) Neotropical Ichthyology Wehitt,Anahí; Colonello,Jorge H.; Macchi,Gustavo J.; Galíndez,Elena J.. ABSTRACT Atlantoraja cyclophora is an endemic skate to the continental shelf of the Southwestern Atlantic Ocean (22ºS-47ºS) and a by-catch species in commercial bottom trawl fisheries. The morphometric relationships, the size at maturity and the reproductive cycle of this species were analyzed, with samples collected between 34ºS and 42ºS. The size range was 190 to 674 mm total length (TL) for males and 135 to 709 mm TL for females. Sexual dimorphism between the relationships TL - disc width and TL - total weight was found, with females wider and heavier than males. The mean size at maturity for males was estimated in 530 mm TL and for females in 570 mm TL. The gonadosomatic index (GSI) in mature females varied seasonally and showed the highest value in... Tipo: Info:eu-repo/semantics/article Palavras-chave: Arhynchobatidae; Dimorphism; Elasmobranchs; Maturity; Reproduction. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000200207 Registros recuperados: 4 Primeira ... 1 ... Última

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