Reproductive biology of the freshwater goby Knipowitschia croatica Mrakovčić, Kerovec, Mišetić & Schneider 1996 (Actinopterygii, Gobiidae)

Abstract

The reproductive biology and gonadogenesis cycle of the Vrgorac goby, Knipowitschia croatica is described [Conservation of Endangered Freshwater Fish in Europe, Birkhauser Verlag, Basel]. The species displays sexual dimorphism during the spawning period. Sexual maturity is achieved at an early age, with 50% of males and females sexually mature at total lengths of 40-45 mm. Fecundity of gravid females ranged from 188 to 593 eggs, with an egg diameter of 0.22-1.11 mm. Though the extended spawning period lasts from March to November, the highest intensity is observed from April to September. A comparison is made of the reproductive biology of this species with other sand goby species of the genera Knipowitschia and Pomatoschistus.

First confirmed record of Pomatoschistus canestrinii (Ninni, 1883) (Gobiidae) from Bosnia and Herzegovina

“…The black-spot goby is a small sized fish; the observed maximum length SL = 3.8 cm in this study is lower than the observed values in the range area reaching a maximum standard size length (SL) of 6.7 cm (Miller, 1986). This data coincides with the Matica River (Croatia) population of Knipowithscia croatica, a similar short-lived goby (Zanella et al, 2011). This data coincides with the Matica River (Croatia) population of Knipowithscia croatica, a similar short-lived goby (Zanella et al, 2011).…”

“…As the species from the genus Pomatoschistus are thought to live up to 2 years (Kottelat and Freyhof, 2007), according to length categories we can assume that the specimens were in the beginning of their second year of life (1+). This data coincides with the Matica River (Croatia) population of Knipowithscia croatica, a similar short-lived goby (Zanella et al, 2011).…”

Reproductive biology of a Gobiid fish Oxyurichthys tentacularis (Valenciennes, 1837) inhabiting Ashtamudi Lake, S. India

“…Studies on the reproductive biology of the family Gobiidae are very few in number. The most notable contributions in this regard are that of, Miller, ; Chesalin, Zuev, & Chesalin, ; La Mesa, Arneri, Caputo, & Lylesias, ; Islam & Joadder, ; Kovacic, ; Kovac, Copp, & Sousa, ; Zanella et al, ; Gkenas & Leonardos, ; Islam & Mollah, ; Hossain, ; Durin, Kohinoor, Mominuzzaman, & Shirajum, .…”

New eastern limit of the geographic distribution of Orsinigobius punctatissimus (Canestrini, 1864) (Teleostei: Gobiiformes: Gobiidae) in northeastern Italy, with biological notes on the species

“…Subadults and adults feed on benthic invertebrates (Gandolfi et al 1991, Bruno & Maugeri 1992, Zerunian 1998, 2002a, 2002b, 2003, 2004, Kottelat & Freyhof 2007, Porcellotti 2005, Fortini 2016). The reproductive biology of O. punctatissimus is similar to that of O. croaticus, studied by Zanella et al (2011). O. punctatissimus reaches a maximum length of 55 mm TL (mostly 20-40 mm TL when mature).…”