Figure 2 - uploaded by Ken Longenecker
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Method for exposing the gonads in a typical coral-reef fish. (a) Orient the fish ventral side up, Insert one tip of scissors into the vent, and make a shallow cut forward to the head (pull up lightly with the scissors and keep them parallel with the belly wall to avoid cutting the digestive organs). (b) Pull the resulting belly flaps laterally to expose the digestive organs. (c) Pull the digestive organs toward the head. (d) The paired gonads (yellow arrows) are attached by connective tissue to the gas bladder (white arrow).
Contexts in source publication
Context 1
... gonads connect to the vent at the posterior end of the visceral cavity. Figure 2 illustrates how to expose the gonads of fishes with the typical body plan. The surgeonfishes have a modified body plan; their gonads are located in the ventral part of the visceral cavity, which extends posterior to the vent ( Figure 3). ...
Context 2
... surgeonfishes have a modified body plan; their gonads are located in the ventral part of the visceral cavity, which extends posterior to the vent ( Figure 3). The approach illustrated in Figure 2 would only expose the gut. Figure 4 illustrates a convenient method to expose the gonads of surgeonfishes. Take note of the fat body illustrated in Figure 3; it is often mistaken for testes. ...
Context 5
... MMCs are occasionally present in many organs (they are not restricted to gonads). MMCs stain quite variably with toluidine blue, sometimes they will be yellowish and other times they will stain darkly as in Figure 24. The production of MMCs, or yellow-brown bodies, from vitellogenic oocytes is a well-documented process. ...
Context 6
... structures may be attached to small gonads when they are removed from a specimen. Those structures may be seen (and cause confusion) on prepared slides (Figure 26). Note: These sections have been stained with hematoxylin and eosin, rather than toluidine blue (used for all previous examples). ...
