Results 1 to 10 of about 2,569 (174)

Reproductive pattern and biochemical composition of the sea urchin, Paracentrotus lividus (Lamarck, 1816) in west Aegean Sea-Türkiye [PDF]

open access: yesBMC Zoology
This study focuses on the annual reproductive cycle and biochemical of Paracentrotus lividus (Lamarck, 1816). Sixty sea urchins were collected monthly from July 2018 to June 2019 in Karaburun, Aegean Sea.
Aysun Küçükdermenci   +5 more
doaj   +2 more sources

Studies on fecundity and Gonadosomatic index of Schizothorax plagiostomus (Cypriniformes: Cyprinidae)

open access: yesJournal of Threatened Taxa, 2014
The present investigation deals with the assessment of fecundity and gonadosomatic index (GSI) of Schizothorax plagiostomus collected from the river Jhelum, Kashmir.
M. Jan, U. Jan, G.M. Shah
doaj   +3 more sources

According to the Hepatosomatic Index and Gonadosomatic Index

open access: yes‬‭Majallah-i ̒Ilmī-i Shīlāt-i Īrān, 1997
The ribbon fishes, belonging to the family Trichiuridae, are one of the most important protein resources in the Indian Ocean. A considerable density of the dominant species of this family, Trichiurus lepturus has been observed in the Oman Sea. During the
Sh. Oryan; K. Parivar; A. Yekrangian; H. Hossein zadeh
doaj   +1 more source

Gonadosomatic index (GSI) of female whitefish (Coregonus lavaretus) in Lake Constance

open access: yesLimnologica, 2000
AbstractFrom 1991 to 1997 the gonadosomatic index (GSI) of pelagic spawning female whitefish (Coregonus lavaretus, local name “Blaufelchen”) in Lake Constance-Obersee was determined. Average GSI increased from low values in summer to a maximum of about 24% immediately before spawning (end of November/beginning of December). The coefficient of variation
Roland Roesch
exaly   +2 more sources

Seasonal changes in gonadosomatic index, hepatosomatic index and condition factor of the female Geno tooth-carp, Aphanius ginaonis [PDF]

open access: yesبوم‌شناسی آبزیان, 2014
A dearth of basic biological information, especially about reproductive traits for the Geno tooth-carp, Aphanius ginaonis, currently hinders the proper management efforts for this valuable species.
Mohammad Mehdipour   +2 more
doaj   +1 more source

COMPARATIVE STUDY OF GONADOSOMATIC INDEX (GSI) OF CAPTIVE REARED AND WILD BROODSTOCK OF SCHIZOTHORAX RICHARDSONII (GRAY, 1832). [PDF]

open access: yesInternational Journal of Advanced Research, 2018
An attempt was made to assess the gonadosomatic index (GSI) of an indigenous coldwater fish Schizothorax richardsonii commonly known as "Asela" in Uttarakhand is one of the most important sports fishery in the state.The fish inhibits in streams and rivers of Himalayan and Sub-Himalayan regions.The gonadosomatic index of both captive reared and wild ...
Amrita Rani   +3 more
exaly   +3 more sources

FEMINIZATION OF NILE TILAPIA Oreochromis niloticus (L.) BY DIETHYLSTILBESTROL GROWTH AND GONADOSOMATIC INDEX

open access: yesEcosistemas y Recursos Agropecuarios, 2015
Sex-reversal by exogenous hormones is the most common technique used to generate monosex popu- lations of Nile tilapia (Oreochromis niloticus). However, this technique has provoked a negative perception in recent years.
José Antonio Marín Ramírez   +4 more
doaj   +2 more sources

Effects of methyl farnesoate injection on spermatozoa number and reproductive indices in the narrow-clawed crayfish Pontastacus leptodactylus [PDF]

open access: yesNauplius, 2022
In this study, the effect of methyl farnesoate (MF) injection on haemolymph MF levels, spermatozoa production and the reproductive indices of gonadosomatic index (GSI), testicular index (TI) and vasosomatic index (VSI) were investigated in males of ...
Mehmet Bal, Ayşe Gül Harlıoğlu
doaj   +1 more source

Body Condition and Reproductive Investment of Mature Male Argentinean Shortfin Squid Illex argentinus

open access: yesProgress in Fishery Sciences, 2023
The Argentinean shortfin squid, Illex argentinus, is an oceanic cephalopod displaying characteristics of short lifespan, fast growth rate, and semelparous reproduction.
Wei LIU   +3 more
doaj   +1 more source

Reproductive performance of laying snails (Archachatina marginata) fed on roughages and different concentrate mixes

open access: yesBulletin of the National Research Centre, 2020
Background This study aims to investigate the reproduction output of Archachatina marginata fed on roughage and concentrate feed with leaf meal-inclusive diets.
Olatunji Abubakar Jimoh   +1 more
doaj   +1 more source

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