Length ratio, histological structure, feed composition, and enzyme activity in the gut of yellow rasbora (Rasbora lateristriata Blkr.)

Abstract

A study of the ratio of gut length, histological structure, feed composition, and enzyme activity in the foregut had carried out to determine the feed category of yellow rasbora. The study used a survey method with sampling in the Banjaran River, Banyumas, Central Java. The research data had analyzed quantitatively and descriptively. The results showed that the gut length ratio of yellow rasbora ranged from 0.53 to 0.81. Gut histological showed no stomach structure with the relative height of the villi in the middle intestine approaching 0.5. Feed composition in the foregut showed that 60% was animal, and the rest were detritus and microalgae. Measurement of protease activity at foregut showed that no acidic protease activity but found alkaline proteases. In conclusion, yellow rasbora was an omnivorous fish with a short intestine and no functioning stomach.

Some of the Biological Aspects of the Brushtooth Lizardfish Saurida undosquamis (Richardson, 1848) Collected from the Commercial Markets of Port Said Governorate, Egypt

“…The gut length to fish length ratio was 0.83, and this matches the feeding habit of this species as they are considered carnivores fish, as carnivores usually have a gut ratio of less than one (Susilo et al, 2021). The highest content of the examined samples was recorded for small fish; this finding agrees with the result of Rahimibashar et al (2012).…”

“…The gut length ratio or relative gut length can be used to compare different fish types based on food. The ratio of the fish's total length to the length of its intestine is known as the relative gut length (Susilo et al, 2021). Organ mass to body weight is calculated using organosomatic indicators.…”