The statistical analysis of the entire display (two-way MANOVA, poisoning factor with inter-subject factor, sum of squares type III) revealed effects from the poisoning on the behaviors of floating, F(35.33, 6) = 2.98, p = .008; breathing, F(226.74, 6) = 2.83, p = .011; swimming with pectoral fins, F(277.60, 6) = 2.51, p = .023; undulations, F(1351.352, 6) = 3.208, p = .005; opening the gill cover
, F(1315.039, 6) = 2.138, p = .051; vertical display, F(932.745, 6) = 2.503, p = .023; arching, F(169.699, 6) = 11.075, p < .001; and retreat, F(83.951, 6) = 9.906, p < .001.
Dorsal rays XIII,17 (last divided to base); anal rays III,18 (last divided to base); pectoral rays 16 (upper two and lowermost unbranched); pelvic rays I,5; transverse scale rows from upper end of gill opening to base of caudal fin 43-45; scale rows above lateral line to origin of dorsal fin 9; scale rows below lateral line to origin of anal fin about 20; lateral line in two sections, the anterior part extending from upper edge of gill cover
to below level of posteriormost dorsal fin ray containing 37 scales and the posterior part containing 7 scales along middle of caudal peduncle; transverse scale rows on opercle 7; gill rakers on first branchial arch 5 + 12, total rakers 17, the rakers short and stubby, much shorter than gill filaments; vertebrae 10 + 14.
Fish breathe with gills (slits on both sides of a fish's head hidden behind a gill cover
The branchial cavity was opened after ascending or removing the branchiostegite (gill cover
) of the branchial chamber, and then the gross morphological features of the gills and associated accessory respiratory organs were examined in situ by the naked eyes, next dissected, and the findings obtained were imaged by means of a Digital Camera (Sony Inc., Japan).
The jaws often extend back to the gill cover
. Most anchovy species also have a silver stripe down the side of an otherwise colorless or darkly pigmented body.
Sliding my fingers under the gill cover
of the fish to hold it firmly in the net, I lifted its giant head enough to wiggle the single hook free.