The red accessory nidamental gland occurred more than 10 times during the entire video footage (Table 3), usually during the daytime, when the females positioned themselves parallel to the males.
The red accessory nidamental gland, lateral mantle spots, infraocular spots, dark fins, and shaded eye were rare in females.
The presence of a spermatophoric sac in males and the orange or pink color of the accessory nidamental gland
in females indicated the mature stage (Richard 1967; Riad 1993).
Behavioral responses to natural eggs were compared with responses to artificial egg capsules coated with extracts (4) from one of four female reproductive organs or glands: ovary, oviducal gland, nidamental gland, or accessory nidamental gland. With the exception of ovary (see below), the equivalent of one-fifth of each gland was used to coat the artificial egg capsules.
Squids responded with the most aggression in response to natural eggs and with the least aggression in response to extracts from nidamental and accessory nidamental glands. Comparisons (11) of treatments versus the control (i.e., natural eggs) revealed that aggressive responses to extracts from nidamental and accessory nidamental glands were significantly lower than responses to natural eggs.
A high incidence of infection (47%) was noted in the reproductive organs (nidamental gland, accessory nidamental gland, and gonads).
The first was multifocal, necrotizing, granuloma-like lesions (0.95-1.4 mm diameter), most often seen in reproductive tissues such as the testicular ducts and accessory nidamental glands (Fig.
The Red accessory nidamental gland can be seen through the translucent mantle and occurs only in fully mature females, so it may be a part of communication even though it is internal.
Red accessory nidamental gland (f) ([approximately equals]200) 18.
So that females could be selected, the gonad at the anterior end of the mantle cavity was first examined in thin sections by light microscopy; if it was judged to be an ovary, the sectioning was continued until the region of accessory nidamental gland
In sexually mature female cephalopods, the accessory nidamental gland
(ANG) harbors a dense bacterial community (1, 2).
Besides indices, 1 of 3 maturity stages was assigned to the specimen collected in different seasons based on the color of accessory nidamental glands
and size of the gonads according to Lipinski (1979).