Evidence map›Paper›PMID 18492646›Full record

ArticleBiology letters2008

A monogamous pipefish has the same type of ovary as observed in monogamous seahorses.

Atsushi Sogabe, Koji Matsumoto, Mizuki Ohashi, Aki Watanabe, Hiromi Takata, Yasunori Murakami, Koji Omori, Yasunobu Yanagisawa

Abstract readComparative Study
In one paragraph

Article in Biology letters, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

3 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Atsushi SogabeCenter for Marine Environmental Studies, Ehime University, Matsuyama, Ehime, Japan. sogabe@mserv.sci.ehime-u.ac.jp
Koji Matsumoto
Mizuki Ohashi
Aki Watanabe
Hiromi Takata
Yasunori Murakami
Koji Omori
Yasunobu Yanagisawa

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Syngnathid fish (pipefish and seahorses) are unique among teleost fish in that their ovary consists of a rolled sheet with germinal ridge(s) on the dorsal side running along the entire length of the sheet. A distinct difference is seen in the ovarian structure between polygamous Syngnathus pipefish and monogamous seahorses (Hippocampus spp.), the former having one germinal ridge and the latter with two ridges. This study examined the ovarian structure and the mode of egg production in a monogamous pipefish Corythoichthys haematopterus. The ovary of C. haematopterus had two germinal ridges like that observed in monogamous seahorses. There were two distinct groups of follicles in the ovary, one being a cohort of extremely small follicles and the other a cohort of follicles developing and increasing in size with the passage of time. We suggest that the ovarian structure and the mode of egg production in this pipefish are adaptations to monogamy.

Indexed as

Sexual Behavior, AnimalAdaptation, PhysiologicalAnimalsFemaleOocytesOvarySmegmamorpha

Identifiers

PMID18492646
PMCPMC2610143

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.