Results 21 to 30 of about 2,569 (174)

Some aspects of the life history of Oxynoemacheilus bergianus (Actinopterygii: Nemacheilidae) from the Jajrud River in the Namak Lake basin, Central Iran [PDF]

Caspian Journal of Environmental Sciences, 2022
The length-weight relationship, breeding season and condition factor of Oxynoemacheilus bergianus from Jajrud River in the Namak Lake basin, Tehran Province, Central Iran, were investigated. Sampling was performed from March 2017 to February 2018.
Amir Pourshabanan, Mehdi Bibak, Mohammad Forouhar Vajargah, Giovanni Rossi, Keyvan Abbasi   +4 more
doaj   +1 more source

A Review of the Research on Reproductive Biology of Turkish Marine Fishes

Çanakkale Onsekiz Mart University Journal of Marine Sciences and Fisheries, 2021
The teleost fish stocks distributed in Turkish seas are threatened due to overfishing, pollution, global warming and increasing food competition. There is a need to provide scientific knowledge on reproductive traits of commercial species in order to ...
İsmail Burak DABAN
doaj   +1 more source

Study of the pineapple peel vinegar potency in restoring the gonadosomatic index of the diabetic rats

Journal of Physics: Conference Series, 2021
Abstract The side effect of Diabetes mellitus is the decrease in the reproductive function which could be observed by the Gonadosomatic Index. Gonadosomatic index is a value that expresses the proportion of testis weight to body weight. Pineapple peel vinegar is a diabetic therapy that has been proved in decreasing the blood sugar levels
A J Sitasiwi, S N Jannah, S Isdadiyanto, T Annisa, C M Hermawati, A M Sari, M A D Putra   +6 more
openaire   +1 more source

Length-weight, Condition factor and gonadosomatic index of blackspot snapper Lutjanus fulviflamma (Forsskal, 1775) (Perciformes: Lutjanidae) in the northern Persian Gulf

International Journal of Aquatic Biology, 2018
The present study aimed to evaluate the length-weight and Length-length relationships as well as the condition factor and gonadosomatic index of the Blackspot snapper, Lutjanus fulviflamma in the northern Persian Gulf, Hormozgan Province, Iran.
Alireza Razi, Ahmad Noori
doaj   +1 more source

Age, reproduction, and fecundity of a population of Cobitis sp. (Actinopterygii: Cypriniformes: Cobitidae) from the Babolrud River in the southern Caspian Sea basin [PDF]

Acta Ichthyologica et Piscatoria, 2011
Background. Loach fishes, Cobitis sp., are found in the majority of streams in the southern Caspian Sea basin, but reproductive parameters of them are barely known.
H. Mousavi Sabet, A. Kamali, M. Soltani, A. Bani, H.R. Esmaeili, H. Rostami, S. Vatandoust, Z. Moradkhani   +7 more
doaj   +3 more sources

Seasonal Variations in Gonadosomatic Index, Hepatosomatic Index, and Condition Factor of Metapenaeus affinis

Egyptian Journal of Aquatic Biology and Fisheries
Samples of Metapenaeus affinis were collected from the Iraqi coastal waters between January 1 and December 1, 2021, to investigate the development of sexual maturity. Seasonal variations in gonadal function were observed in males, with peak rates (0.052) recorded in summer and the lowest rates (0.024) in winter.
Intisar Jabbar, Ibtisam Abdul-Sahib, Aqeel Al-Waeli, Azhar Abdul-Sahib, Tariq Al-Maliky   +4 more
openaire   +2 more sources

An indirect approach to estimate spawning fraction as applied to Sardinops sagax from northern Chile

Scientia Marina, 2001
The spawning fraction of fishes with multiple spawnings and indeterminate fecundity is normally estimated through biologically intensive and time-consuming histological procedures, such as the one based on the proportion of females with post-ovulatory ...
Gabriel Claramunt, Rubén Roa
doaj   +1 more source

Effects of Water Temperature on Gonads Growth in Ambystoma mexicanum Axolotl Salamanders

Animals, 2023
The thermal environment is a major factor influencing amphibians. For example, amphibian reproduction occurs in specific temperatures, and minor changes in this aspect could have negative impacts on this biological process.
Chester R. Figiel
doaj   +1 more source

Reproductive biology of Yellowfin Seabream Acanthopagrus latus in coastal waters of Hormozgan [PDF]

بوم‌شناسی آبزیان, 2012
Some reproductive biology features of Yellowfin Seabream Acanthopagrusl atus including gonadosomatic index, hepatosomatic index, sex ratio, macroscopic and microscopic survey of gonad development, frequency of different maturationstages and absolute and ...
Shahlah Nikkhah Khaje Ataei, Iman Sourinejad, Ehsan Kamrani, Mehdi Ghodrati Shojaei, Majid Shahsavari, Mohammad Asadi   +5 more
doaj  

The evolution of gonad expenditure and gonadosomatic index (GSI) in male and female broadcast‐spawning invertebrates

Biological Reviews, 2017
ABSTRACTSedentary broadcast‐spawning marine invertebrates, which release both eggs and sperm into the water for fertilization, are of special interest for sexual selection studies. They provide unique insight into the early stages of the evolutionary succession leading to the often‐intense operation of both pre‐ and post‐mating sexual selection in ...
Parker, Geoff A., Ramm, Steven A., Lehtonen, Jussi, Henshaw, Jonathan M.   +3 more
openaire   +4 more sources