Купил трех очень симпатичных бычков, очень хотелось бы узнать кто они такие
размер 4 см. на брюхе присоска
похоже из бычковых
ведут себя активно, драк нет, ползают по листьям, что-то собирают
в магазине их обозвали как чернополосый сомик

Ирик

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сообщение newby

Of the nine species of sicydiine gobies (Sicydiinae)
distributed in the Ryukyu Islands of southern Japan,
seven (Lentipes armatus, Sicyopterus japonicus, Sicyopterus
lagocephalus, Sicyopus zosterophorum, Stiphodon
atropurpureus, Stiphodon imperiorientis, and Stiphodon
percnopterygionus) occur in the rivers on Okinawa Island
(Akihito et al., 2000, Yonezawa and Iwata, 2001, Suzuki
and Shibukawa, 2004). However, except for Sicyopterus
japonicus, little is known about the reproductive biology of
sicydiine gobies in Japan (Dotsu and Mito, 1955). Reproductive
biology and characteristics of eggs and larvae have been
studied in several sicydiine species from other regions
(Manacop, 1953; Maciolek, 1977; Kinzie, 1993; Bell and
Brown, 1995; Bell et al., 1995; Way et al., 1998; Lindstrom,
1999), but no such studies have been published on
Stiphodon to date.
The genus Stiphodon inhabits freshwater rivers throughout
the central and western Pacific region (Watson, 1995).
The herbivorous S. percnopterygionus occurs in southern
Japan (Ryukyu Islands, Ogasawara Islands, and Miyazaki
and Kochi prefectures), eastern Taiwan, and Micronesia
(Shibutani and Takahashi, 1998; Watson and Chen, 1998;
Akihito et al., 2000; Sasaki et al., 2001), where it is usually
found in riffles or pools in the upper to middle reaches of
rivers (Iwata, 1989; Watson and Chen, 1998). Males have
elongated first dorsal fin rays and exhibit either an orange
or a dark blue color phase, whereas females have two black
longitudinal stripes along their bodies (Iwata, 1989; Watson
and Chen, 1998; Suzuki and Shibukawa, 2004).
Five sicydiine gobies (Lentipes armatus, Sicyopterus
lagocephalus, Sicyopus leprurus, Sicyopus zosterophorum,
and Stiphodon imperiorientis) are listed as being endangered or critically endangered species in Japan
(Iwata, 2003; Suzuki, 2003). While a greater understanding
of their ecology is thus necessary for their conservation
(Iwata, 1997), intensive research of their respective life histories
is difficult. Although S. percnopterygionus is commonly
found in the rivers on Okinawa Island at present, the
number of individuals is likely to decrease because of environmental
degradation and the activities of amateur and
professional fish collectors. The same threats apply to the
five aforementioned sicydiine gobies.
The aims of this study are to determine the size at
maturity, spawning season, and batch fecundity of S.
percnopterygionus on Okinawa Island. The morphology of
eggs and early larvae in this species are also described.
Materials and Methods
Fishes were collected with hand net from the Sate, Aha, and
Teima rivers (26°32–47¢ N, 128°13–18¢ E) on Okinawa Island
from September 2001 to August 2002. The river substrate
at each sampling site was gravel, and sampling sites were
located at distances of approximately 0.5, 1.5, and 2.0km
upstream of the Sate, Aha, and Teima River mouths, respectively.
The depth at each sampling site was less than 1m.
Water temperature was measured immediately above the
riverbed at each sampling site at the time of collection.
Daylength for Okinawa Island was taken as the time of
sunrise and sunset issued by the Meteorological Agency,
Tokyo, Japan. After measuring standard length (SL) and
body weight, specimens were fixed in 10% neutral formalin
solution.

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