Histological Features of the Gastrointestinal Tract of Wild Indonesian Shortfin Eel, Anguilla bicolor bicolor (McClelland, 1844), Captured in Peninsular Malaysia

Table 1

The measurement of different features in all segments and between oesophagus, stomach, and intestine of collected Anguilla bicolor bicolor.

Organs	Segments	Features (µm)
		MP	LP	ICM	OLM	GG
Oesophagus	1st	1130.8 ± 72.1^abc	113.1 ± 11.9^d	278.1 ± 8.3^c	229.7 ± 6.2^b	—
	2nd	675.5 ± 40.1^d	74.4 ± 4.9^d	262.5 ± 12.2^c	217.6 ± 12.9^bc	—
	3rd	739.8 ± 25.5^cd	123.8 ± 8.0^d	73.7 ± 6.9^d	128.4 ± 6.1^de	—
	4th	795.5 ± 28.7^bcd	71.9 ± 10.9^d	71.6 ± 6.2^d	87.8 ± 7.0^ef	—
	5th	858.8 ± 59.8^bcd	41.0 ± 2.4^d	74.5 ± 4.5^d	63.9 ± 3.9^f	—
	Mean ± SEM					—
Stomach	Cardiac	1438.2 ± 134.4^a	424.0 ± 37.9^ab	555.5 ± 25.0^a	151.9 ± 5.9^d	222.8 ± 15.7^a
	Pyloric	1146.3 ± 120.6^ab	266.7 ± 17.3^c	282.1 ± 8.8^c	173.5 ± 9.6^cd	241.5 ± 68.2^a
	Mean ± SEM
Intestine	Anterior	1022.3 ± 122.59^bcd	257.9 ± 21.4^c	235.9 ± 4.2^c	120.1 ± 8.6^de	—
	Intermediate	1160.3 ± 92.8^ab	480.9 ± 32.8^a	237.9 ± 8.2^c	117.9 ± 8.2^def	—
	Posterior	964.0 ± 112.0^bcd	302.9 ± 22.7^c	287.8 ± 10.6^c	212.9 ± 13.9^bc	—
	Rectum	895.8 ± 68.9^bcd	333.5 ± 18.9^bc	379.9 ± 23.4^b	469.7 ± 29.7^a	—
	Mean ± SEM					—

MP: height of mucosal projection; LP: thickness of lamina propria; ICM: thickness of inner circular muscle; OLM: thickness of outer longitudinal muscle; and GG: thickness of gastric gland. Data are presented in mean ± (standard error of mean) SEM from 28 collected samples. For comparison, features in different organs and segments, the same superscript in uppercase letter within columns and lowercase letter within rows, respectively, are not significantly different.