Impact of the Duration of Larval Yolk Sac Absorption on the Development of Rainbow Trout Oncorhynchus mykiss (Walbaum 1792) Fry

Autor: Antonia Kurtela
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Croatian Journal of Fisheries, Vol 79, Iss 3, Pp 119-123 (2021)
Croatian Journal of Fisheries : Ribarstvo
Volume 79
Issue 3
ISSN: 1848-0586
1330-061X
Popis: Rainbow trout Oncorhynchus mykiss (Walbaum 1792) larvae that first started active feeding were separated into 3 replicate batches (1A, 1B, 1C) with 100 individuals each, while four days later, the fry that last started active feeding were also distributed in 3 replicate batches (2A, 2B, 2C) with 100 individuals. Four measurements were performed with an interval of four days between the first and second measurements, as well as between the third and fourth measurements, to compare the initial masses of individuals by groups (1ABC and 2ABC) on the same day from the beginning of active feeding. The average initial body weight of the fry per batch in each measurement was generally higher in the first group (1ABC) than in the second group (2ABC). However, when comparing the weight of both groups for the same number of days from the beginning of active feeding, it is noticed that the second group (2ABC) has a higher average individual weight than the first group (1ABC). There was no statistically significant difference (one-way ANOVA, p>0.05) in SGRw between the groups in the first three measurements, while there is a statistically significant difference (one-way ANOVA, p
Ličinke Kalifornijske pastrve (Oncorhynchus mykiss, Walbaum, 1792) koje su prve započele sa aktivnom hranidbom izdvojene su u tri replikatne skupine (1A,1B,1C) po 100 jedinki, dok su ličinke koje su zadnje započele s aktivnom hranidbom izdvojene četiri dana iza, te također raspoređene u tri replikatne skupine (2A, 2B, 2C) po 100 jedinki. Obavljena su četiri mjerenja, s razmakom od četiri dan između prvog i drugog mjerenja, kao i između trećeg i četvrtog mjerenja, kako bi se usporedile inicijalne mase jedinki po grupama (1ABC i 2ABC) na isti dan od početka aktivne hranidbe. Prosječna inicijalna masa mlađi je generalno veća kod prve skupine (1ABC) u sva četiri mjerenja. Ipak, kod usporedbe prosječne inicijalne mase kod obje grupe (1ABC I 2ABC) na isti broj dana od početka aktivne hranidbe, grupa 2ABC ima višu prosječnu inicijalnu masu od grupe 1ABC. Nije bilo statistički značajne razlike (ANOVA, p>0,05) između grupa kod SGRw-a u prva tri mjerenja, dok kod četvrtog mjerenja postoji statistički značajna razlika (ANOVA, p
Databáze: OpenAIRE
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