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	<title>sexual size dimorphism &#8211; BIOENGINEER.ORG</title>
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		<title>Hidden Catfish of Mexico&#8217;s Biosphere Reserve Reveal Surprising Reproductive Secrets</title>
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		<pubDate>Sat, 17 Oct 2026 18:37:02 +0000</pubDate>
				<category><![CDATA[Biology]]></category>
		<category><![CDATA[catfish]]></category>
		<category><![CDATA[Conservation]]></category>
		<category><![CDATA[fecundity]]></category>
		<category><![CDATA[freshwater fish]]></category>
		<category><![CDATA[Neotropical]]></category>
		<category><![CDATA[Oaxaca]]></category>
		<category><![CDATA[reproductive biology]]></category>
		<category><![CDATA[Rhamdia]]></category>
		<category><![CDATA[sex ratio]]></category>
		<category><![CDATA[sexual size dimorphism]]></category>
		<category><![CDATA[size at first maturity]]></category>
		<category><![CDATA[Tehuacán-Cuicatlán Biosphere Reserve]]></category>
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					<description><![CDATA[A new study documents the distribution and reproductive biology of two native catfish species in Mexico's Tehuacán-Cuicatlán Biosphere Reserve, revealing female-biased size dimorphism and high fecundity.]]></description>
		
		
		
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		<title>Broader Heads, Not Bigger Bodies: Male Combat Shapes Endangered Guatemalan Alligator Lizard</title>
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		<pubDate>Sat, 17 Oct 2026 18:08:28 +0000</pubDate>
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		<category><![CDATA[Abronia campbelli]]></category>
		<category><![CDATA[alligator lizards]]></category>
		<category><![CDATA[allometry]]></category>
		<category><![CDATA[arboreal reptiles]]></category>
		<category><![CDATA[bite force]]></category>
		<category><![CDATA[caudal autotomy]]></category>
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		<category><![CDATA[Guatemala]]></category>
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		<category><![CDATA[male combat]]></category>
		<category><![CDATA[sexual selection]]></category>
		<category><![CDATA[sexual size dimorphism]]></category>
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					<description><![CDATA[A study of 54 Campbell's Alligator Lizards in Guatemala found males and females are similar in body size and tail loss, but males have heads roughly 19 percent wider, pointing to sexual selection through combat and mate-grasping.]]></description>
		
		
		
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