Results 111 to 120 of about 3,896,690 (244)

On the biology of the European flying squid Todarodes sagittatus (Lamarck, 1798) (Cephalopoda: Ommastrephidae) in the central eastern Atlantic [PDF]

open access: yes, 1998
A total of 206 specimens of the ommastrephid squid Todarodes sagittatus, obtained from three areas of the central eastern Atlantic (Canary Islands/African coast, Madeira, and the Gettysburg Bank area south of Portugal) were examined.
Clarke, M.R.   +2 more
core   +1 more source

Biology and assessment of the painted sweetlips (Diagramma pictum (Thunberg, 1792)) and the spangled emperor (Lethrinus nebulosus (Forsskål, 1775)) in the southern Arabian Gulf [PDF]

open access: yes, 2006
The population biology and status of the painted sweeplips (Diagramma pictum) and spangled emperor (Lethrinus nebulosus) in the southern Arabian Gulf were established by using a combination of size-frequency, biological, and size-at-age data.
Al Abdessalaam, Thabit Z.   +3 more
core  

Gonadosomatic Index and Testis Morphology of Common Carp (Cyprinus carpio) in Rivers Contaminated with Estrogenic Chemicals.

open access: yesJournal of Veterinary Medical Science, 2002
To study the effect of estrogenic chemicals on fish, the gonadosomatic index (GSI = [testis weight/body weight] x 100) and testis histology of mature common carp (Cyprinus carpio) from 2 contaminated sites (Ishizu and Wada rivers, Osaka) and a control site were examined between June 1998 and March 2001. The concentration of nonylphenol, bisphenol A and
Amin, Hassanin   +6 more
openaire   +3 more sources

STUDIES OF ANNUAL GONADAL DEVELOPMENT AND GONADAL ULTRASTRUCTURE IN SPINY-CHEEK CRAYFISH (ORCONECTES LIMOSUS)

open access: yesKnowledge and Management of Aquatic Ecosystems, 2007
The aim of this study was to follow the gonadal development in freshwater crayfish Orconectes limosus (Rafinesque) by histological examination of ovaries and testes as well as monthly investigation of the gonadosomatic index over a period of one year ...
KOZÁK P.   +3 more
doaj   +1 more source

The impact of captivity on fertilization, cortisol and glucose levels in plasma in kutum broodstock [PDF]

open access: yes, 2010
Gravid wild kutum broodstock, Rutilus frisii kutum, on their upstream migration to Valiabad River (northern Iran) were kept in captivity to allow them to ovulate (captive ripe).
Nikoo, M., Yasemi, M.
core  

Female reproductive cycle of the Southwestern Atlantic estuarine crab Chasmagnathus granulatus (Brachyura, Grapsoidea, Varunidae)

open access: yesScientia Marina, 2004
The female reproductive biology of a Chasmagnathus granulatus population inhabiting the area near the mouth of Mar Chiquita coastal lagoon, Argentina, was studied.
Romina B. Ituarte   +2 more
doaj   +1 more source

Reproductive biology of ridgeback shrimp Solenocera choprai (Decapoda, Penaeoidea, Solenoceridae) off Mangalore coast, south India [PDF]

open access: yes, 2008
The ridgeback shrimp Solenocera choprai has emerged as one of the important commercial species in 60–100 m depth zone off Karnataka coast, India, since 1993. Studies were conducted on S.
Dineshbabu, A P, Manisseri, Joseph K
core   +1 more source

Biochemical variation during ovarian vitellogenic growth in a hill stream teleost Garra mullya (Sykes) due to cadmium toxicity [PDF]

open access: yes, 1991
Some biochemical variations during ovarian vitellogenic growth in hill-stream teleost Garra mullya due to sublethal concentration of cadmium has been discussed.
Khan, E.A.   +4 more
core  

[Fertility, fecundity and gonadosomatic index of Poecilia reticulata (Pisces: Poeciliidae) in Heredia, Costa Rica].

open access: yesRevista de biologia tropical, 2004
Entre setiembre y noviembre de 1998 se determinó la fecundidad, fertilidad e índice gonadosomático de Poecilia reticulata (Peters 1859), a partir de especímenes recolectados en un estanque en Santo Domingo de Heredia, Costa Rica. Las hembras presentaron una longitud total promedio de 34.43 ± 7.26 mm con un ámbito entre 17.80 y 51.50 mm y un peso total ...
Urriola Hernández, Mario   +2 more
openaire   +2 more sources

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