Ovarian steroid glucuronides function as sex pheromones for male zebrafish, Brachydanio rerio

Female zebrafish become attractive to male conspecifics by means of a specific sex attractant secreted by the ovaries. This sex attractant consists of steroid glucuronides; most likely a mixture containing oestradiol-17β- and testosterone glucuronide. Anosmic males are not attracted by the female pheromones and fail to court females with ovulated eggs in the abdomen. Male zebrafish thus detect the ovarian sex attractant, which motivates them to start a series of courtship actions, by olfaction.

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Sex Attractant of a Clearwing Moth Synanthedon Nashivora (Lepidoptera: Sesiidae)

10.21203/rs.3.rs-168695/v1 ◽

2021 ◽

Author(s):

Hideshi Naka ◽

Takahiro KUKIZAKI ◽

Susumu TOKUMARU ◽

Satoshi OHNO ◽

Yuki MATSUI

Keyword(s):

Sex Pheromones ◽

Sex Attractant ◽

Novel Species ◽

Seasonal Occurrence ◽

Screening Tests ◽

Mixture Ratio ◽

Asian Pear ◽

Clearwing Moth

Abstract A sex attractant of Synanthedon nashivora Naka and Yano, a pest of Asian pear discovered in Kyoto, Japan in 2014 and described as a novel species in 2019 was revealed. Pheromone lures baited mixtures with one or two of the seven compounds used as sex pheromones by Sesiidae species were prepared, and screening tests were conducted using these lures in pear orchards in Kyotango City, Kyoto Prefecture, Japan, from 2017 to 2018. Males were attracted to various mixture ratios, especially 7:3 mixture ratio, of (3Z,13Z)-3,13-octadecadienyl acetate (Z3,Z13-18:OAc) and (2E,13Z)-2,13-octadecadienyl acetate (E2,Z13-18:OAc) mixtures. This finding will enable monitoring of this species in Asian pear orchards. By attempting to search for males in the field using this pheromone lure, it will be possible to understand the distribution of this species in Japan and neighboring countries, its microhabitat, and the seasonal occurrence of this species.

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SEX ATTRACTANT BLENDS FOR STRAWBERRY CUTWORM, AMPHIPOEA INTEROCEANICA (SMITH), AND A CLOSELY RELATED SPECIES, AMPHIPOEA AMERICANA (SPEYER) (LEPIDOPTERA: NOCTUIDAE)

The Canadian Entomologist ◽

10.4039/ent119301-3 ◽

1987 ◽

Vol 119 (3) ◽

pp. 301-303

Author(s):

D.L. Struble ◽

G.L. Ayre ◽

J.R. Byers

Keyword(s):

North America ◽

Convenient Method ◽

Related Species ◽

Sex Pheromones ◽

Sex Attractant ◽

Similar Species ◽

Closely Related Species ◽

Tetradecenyl Acetate ◽

Important Pest ◽

Lepidoptera Noctuidae

The strawberry cutworm, Amphipoea interoceanica (Smith), has recently become an important pest of strawberry plants in Manitoba (Ayre 1980) and Quebec (Mailloux and Bostanian 1985). Larvae damage or kill the plants and commercial plantings are sometimes heavily damaged. Strawberry cutworm is widely distributed in North America and is broadly sympatric with a morphologically similar species, Amphipoea americana (Speyer) (Forbes 1954), which is occasionally a pest of corn (Gibson 1920). Sex pheromones of these species have not been reported, although Roelofs and Comeau (1971) found that males of strawberry cutworm were attracted to (Z)-9-tetradecenyl acetate (abbrev. Z9- 14:Ac). A sex attractant for strawberry cutworm would provide a convenient method for monitoring population levels in the vicinity of strawberry fields.

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Cadmium dynamics in fish: pulse studies with 109Cd in female zebrafish, Brachydanio rerio

Journal of Fish Biology ◽

10.1111/j.1095-8649.1985.tb03202.x ◽

1985 ◽

Vol 27 (5) ◽

pp. 571-581 ◽

Cited By ~ 24

Author(s):

L. Karlsson-Norrgren ◽

P. Runn

Keyword(s):

Brachydanio Rerio ◽

Female Zebrafish

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Sex attractants and seasonal flight patterns for three Eucosma (Lepidoptera: Tortricidae) species sympatric in eastern pine seed orchards and plantations

The Canadian Entomologist ◽

10.4039/ent134391-3 ◽

2002 ◽

Vol 134 (3) ◽

pp. 391-401 ◽

Cited By ~ 3

Author(s):

G.G. Grant ◽

P. de Groot ◽

D. Langevin ◽

S.A. Katovich ◽

K.N. Slessor ◽

...

Keyword(s):

Sex Pheromones ◽

Sex Attractant ◽

Pinus Resinosa ◽

Sympatric Species ◽

Red Pine ◽

White Pine ◽

Eastern White Pine ◽

Host Preferences ◽

Seed Orchards ◽

Isolating Mechanisms

AbstractSex attractant blends were developed for monitoring three conifer-feeding species of Eucosma Hübner found in pine seed orchards and plantations in Wisconsin and Ontario. Eucosma monitorana Heinrich, which attacks developing cones of red pine, Pinus resinosa Aiton (Pinaceae), preferred lures containing 100:5:15 (μg blend) of (Z)-9-dodecenyl acetate (Z9-12:Ac), (E)-9-dodecenyl acetate (E9-12:Ac), and (Z)-9-dodecen-1-ol (Z9-12:OH), respectively, over lures without the alcohol or with higher levels of E9-12:Ac. This blend was unattractive to sympatric Eucosma gloriola Heinrich, a species that feeds inside shoots of red pine and eastern white pine, Pinus strobus L. Eucosma gloriola was attracted to a 100:30 blend of Z9-/E9-12:Ac, and adding Z9-12:OH had no significant effect. Eucosma tocullionana Heinrich, which attacks cones of eastern white pine, was attracted equally to 10:3 and 10:5 μg blends of Z9-/E9-12:Ac, and adding Z9-12:OH had no effect. A ratio as low as 1:0.3 was attractive to E. tocullionana but not to sympatric E. gloriola, which preferred a 100-fold higher dosage of the same blend. The seasonal flight periods of the three species overlapped in all study areas. The flight of E. gloriola usually peaked in late May slightly before that of E. monitorana while the flight of E. tocullionana peaked about 1–3 weeks later. The results indicate that sex pheromones, seasonal flight periods, and host preferences are isolating mechanisms for these closely related sympatric species.

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