Hatchery Management of Major Cultivable Fin-Fishes | Chapter 10 | Newest Updates in Agriculture and Veterinary Science Vol. 3

 The significance of captive breeding and hatchery administration assumes greater meaning in increasing finfish production. This branch has been organized to give an overview of the organic breeding habitats of finfish from bordering the water sources and seed group from riverine as well as salt solution sources. The importance of hydrological and hydro-organic factors concerning the natural breeding of finfish has happened dealt with in detail. The intercourse maturity and breeding seasons of miscellaneous cultivable species stressing the development of gametes in male and female fishes have been handled. Different methods of training finfish. Induced breeding of fin fishes, the effect of material factors on spawning has existed explained. Different aspects of administration of broodstock.

Author(s) Details:

Rana Rushirajsinh Jitendrasinh,
Department of Aquaculture, College of Fisheries Science, Kamdhenu University, Veraval- 362265, India.

A. S. Kotiya,
Fisheries Research and Training Center, Kaamdhenu University, Mahuva, Gujarat, India.

K. H. Vadher,
Fisheries Research and Training Center, Kaamdhenu University, Mahuva, Gujarat, India.

Please see the link here: https://stm.bookpi.org/NUAVS-V3/article/view/9775

Reproductive Aspects of Poecilia sphenops in a Reservoir at Morelos State, Mexico | Chapter 3 | Recent Research Advances in Biology Vol. 3

Poecilia sphenops is a native species recently reported to be widespread and widely distributed in the Balsas basin and the Amacuzac River in Morelos (Mexico). This research studied some aspects of Poecilia sphenops reproductive biology from the Emiliano Zapata reservoir in Central Mexico. Specimens were collected from January to December 2006 using a 20 m-long die with a 5 mm mesh scale. A total of 581 specimens were collected: 407 females (70.0%), 83 males (14.3%) and 91 non-differentiated sex individuals (15.7 percent ). The fish had a total length of between 20 and 96 mm and a body weight of between 0.01 and 13.07 g. The ratio of female to male sex (4.9:1) substantially deviated from the unit (χ2= 214.2, p<0.05). Monthly differences in gonadosomatic (GSI) and hepatosomatic (HSI) indexes and stages of ovarian growth showed that the spawning season of P. sphenops coincided with the rainy season between July and October. In February, another reproduction peak was recorded. For males and females, the largest length recorded was 96 mm and 83 mm, respectively. Some of the variables that could restrict fish reproduction in the reservoir were temperature, food availability and efficiency. The reproductive knowledge obtained in this P. sphenops analysis would make it possible to control fisheries. No concrete steps to control this resource have been introduced to date. In exploitation, the size at first maturity should be considered.

Author(s) Details

Gómez-Márquez, José Luis
Laboratorio de Limnología, F.E.S. Zaragoza, U.N.A.M., C.P. 09230 Iztapalapa, Ciudad de México, Mexico.

Peña-Mendoza, Bertha
Laboratorio de Limnología, F.E.S. Zaragoza, U.N.A.M., C.P. 09230 Iztapalapa, Ciudad de México, Mexico.

Guzmán-Santiago, José Luis
Laboratorio de Limnología, F.E.S. Zaragoza, U.N.A.M., C.P. 09230 Iztapalapa, Ciudad de México, Mexico.

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