本文選題：四大家魚 + 資源調(diào)查��； 參考：《南方農(nóng)業(yè)學(xué)報(bào)》2016年01期

【摘要】：【目的】調(diào)查評(píng)估紅水河四大家魚資源現(xiàn)狀,為其漁業(yè)資源可持續(xù)開發(fā)利用提供參考依據(jù)�！痉椒ā吭诩t水河干流設(shè)置天峨、東蘭、大化、都安及來賓5個(gè)監(jiān)測(cè)站位,按季度現(xiàn)場(chǎng)采樣和固定漁船捕撈記錄,調(diào)查紅水河四大家魚占漁獲物比例、種群結(jié)構(gòu)特征及其繁殖生物學(xué)特性。【結(jié)果】紅水河四大家魚占漁獲物比例合計(jì)為10.38%,其排序?yàn)轺?3.41%)青魚(2.94%)鰱(2.93%)草魚(1.09%)。青魚體長(zhǎng)以400.1~600.0 mm為主(占61.53%),體重以≥1200.1 g為主(占84.62%);年齡由0+~5+共6個(gè)年齡組組成,各年齡組百分比相對(duì)較接近;草魚體長(zhǎng)以200.1~400.0 mm為主(占72.41%),體重以200.1~700.0 g居多(占55.17%),年齡以0+齡和1+齡居多,分別占草魚總數(shù)的48.3%和34.5%;鰱體長(zhǎng)以200.1~600.0 mm為主(占96.55%),體重以≥1200.0 g居多(占48.28%),年齡以1+齡最多,占鰱總數(shù)的55.2%;鳙體長(zhǎng)以200.1~400.0 mm為主(占52.94%),體重以200.1~700.0 g為主(占55.56%),年齡以0+齡最多,占鳙總數(shù)的59.3%。四大家魚的親魚比例為38.9∶27.8∶27.8∶5.5,其性比(雌∶雄)分別為:青魚42.9∶57.1、草魚55.0∶45.0、鰱62.5∶37.5、鳙50.0∶50.0,均接近于l∶l;相對(duì)繁殖力均值為青魚11.85~17.63粒/g、草魚32.33~43.48粒/g、鰱10.48~16.70粒/g、鳙5.93粒/g�！窘Y(jié)論】紅水河四大家魚資源量呈下降趨勢(shì),草魚、鰱、鳙捕撈壓力過大,其種群呈小型化和低齡化;四大家魚的個(gè)體繁殖力偏低,其群體自我補(bǔ)充能力基本喪失。
[Abstract]:[objective] to investigate and evaluate the present situation of four domestic fish resources in Hongshui River, and to provide reference for the sustainable exploitation and utilization of fishery resources. [methods] five monitoring stations of Tianao, Donglan, Dahua, Duan and Gui were set up in the main stream of Hongshui River. Sampling and fixing fishing records on a quarterly basis to investigate the proportion of the four largest fish catches in the Red Water River. [results] the total proportion of the four domestic fishes in the catch was 10.38. The order was bighead carp (3.41%), herring fish (2.94%), silver carp (2.93%) and grass carp (1.09%). The main body length of herring is 400.1 (61.53%), the body weight is more than 1200.1 g (84.62%), the age is composed of 6 age groups, the percentage of each age group is relatively close. The main body length of grass carp was 200.1f.400.0 mm (72.41%), the body weight of grass carp was 200.1f.700.0 g (55.17%), the majority of them were 0 and 1 years old, which accounted for 48.3% and 34.5mm of the total number of grass carp respectively, 200.1600.0 mm (96.55%), the weight 鈮，

本文編號(hào)：2076815