Unselective fishing methods and fry collection during the spawning season compromise the sustainability of the local fisheries industry 一網(wǎng)打盡的捕魚方式,以及在產(chǎn)卵期間采捕魚苗,均會削弱本地漁業(yè)的可持續(xù)發(fā)展。
In spawning season , the oviduct differentiated evidently into three parts : the fimbriase of the oviduct , the middle main oviduct and the uterine part 產(chǎn)卵期輸卵管明顯分成傘部,中段和直段,其末端以尖端突入泄殖腔。 3
The temperature of creek segments down from dam no . 2 has exceeded the upper survival limit of juvenile salmons . the spawning season temperature of these segments also tends to surpass normal reproduction temperature range 二號壩以下溪段七、八月的夏季高溫已到達幼鮭耐受極限,生殖季節(jié)水溫亦偏高,為不適于棲息之環(huán)境。
It s a species of large squid with a bit brown color . the spawning season is from every december to the next january , and swim to the yellow sea after may , in july and august , it come to the area of bo sea , and continue to move to the east from september 魚體大,內(nèi)殼角質(zhì)透明,棕黃色,產(chǎn)卵期在12月至豎年1月, 5 - 6月進入黃海中部, 7 - 8月在渤海灣一帶, 9月東移, 12月以后產(chǎn)卵,力衰死亡。
Black paradise fish inhabits in sluggish , swampy of water bodies , with elliptical and laterally compressed body , black to grayish body ; during spawning season , males exhibit a dark colour ; males have a maximum size about 12cm while females about 8cm 它主要生長在水流緩慢的沼澤水域,身體呈橢圓形,側(cè)端扁平,體色偏黑,在繁殖時體色會變得深黑成熟的公魚可長至12公分左右,母魚則長8公分左右。
Black paradise fish inhabits in sluggish , swampy of water bodies , with elliptical and laterally compressed body , black to grayish body ; during spawning season , males exhibit a dark colour ; males have a maximum size about 12cm while females about 8cm 它主要生長在水流緩慢的沼澤水域,身體呈橢圓形,側(cè)端扁平,體色偏黑,在繁殖時體色會變得深黑;成熟的公魚可長至12公分左右,母魚則長8公分左右。
The testes of pseudobagurs fulvidraco ( richardson ) can be divided into two parts . the anterior part is spermatogenic part where spermatogenesis proceed . the posterior part of it is the seminal vesicle , which can store sperms and produce large amount of fluid during spawning season . at the end of april , the spermatogenic part of the testes , which is at stage , begin the initiation of spermatogenesis . in may , the spermatogenic part of the testes , which is at stage , starts active spermatogenesis . from june to novermber , the spermatogenic part is at stage , and spermatogenesis is actively proceeding . from december to the beginning of next april , the spermatogenic part is at stage . the wall of the lobulus is made up of cystes of spermatogonia throughout the whole winter time 黃顙魚的精巢從外形上分為上、下兩段.上段為生精部,下段為貯精囊.性成熟黃顙魚精巢的生精部為小葉型結(jié)構(gòu),其周年變化經(jīng)歷如下過程:期?期?期?期?期. 4月下旬開始生精活動的啟動.生殖季節(jié)為5 7月, 5月生精部處于期. 6 7月生精部處于期,產(chǎn)生大量精子. 8 11月雖非生殖季節(jié),生精部仍進行生精活動. 12月至翌年4月,生精部處于期,并以期精巢過冬.貯精囊在生殖季節(jié)分泌活動旺盛,產(chǎn)生大量分泌物